diff --git a/packages/@n8n/permissions/src/roles/__tests__/custom-role-scopes.test.ts b/packages/@n8n/permissions/src/roles/__tests__/custom-role-scopes.test.ts
index 6df63f5fbb4..4ed5c9eaff0 100644
--- a/packages/@n8n/permissions/src/roles/__tests__/custom-role-scopes.test.ts
+++ b/packages/@n8n/permissions/src/roles/__tests__/custom-role-scopes.test.ts
@@ -4,6 +4,7 @@ import {
 	GLOBAL_CUSTOM_ROLE_SCOPES,
 	PROJECT_CUSTOM_ROLE_SCOPES,
 } from '@/roles/custom-role-scopes.ee';
+import { GLOBAL_MEMBER_SCOPES } from '@/roles/scopes/global-scopes.ee';
 import { ALL_SCOPES } from '@/scope-information';
 
 describe('custom role scope whitelists', () => {
@@ -53,20 +54,64 @@ describe('custom role scope whitelists', () => {
 		expect(bundle).toContain('chatHub:message');
 	});
 
-	it('includes AI Assistant and n8n Agent scopes in the settings.Manage bundle', () => {
-		const bundle = GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.settings.Manage;
+	it('exposes AI Assistant and n8n Agent scopes as their own use/manage options', () => {
+		const { 'AiAssistant use': use, 'AiAssistant manage': manage } =
+			GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.settings;
 
-		expect(bundle).toContain('aiAssistant:manage');
-		expect(bundle).toContain('instanceAi:manage');
-		expect(bundle).toContain('instanceAi:message');
+		expect(use).toContain('instanceAi:message');
+		expect(use).toContain('instanceAi:gateway');
+		expect(manage).toContain('aiAssistant:manage');
+		expect(manage).toContain('instanceAi:manage');
+		expect(manage).toContain('instanceAi:message');
+		expect(manage).toContain('instanceAi:gateway');
 	});
 
-	it('includes instance-level MCP scopes in the settings.Manage bundle', () => {
+	it('"AiAssistant use" matches GLOBAL_MEMBER_SCOPES\' instanceAi:* grants exactly', () => {
+		// Member's baseline AI Assistant access is `instanceAi:message` +
+		// `instanceAi:gateway` (computer-use gateway pairing). A custom role built
+		// to mirror Member must get both, or it ends up strictly weaker than Member.
+		const use = GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.settings['AiAssistant use'];
+		const memberInstanceAiScopes = GLOBAL_MEMBER_SCOPES.filter((s) => s.startsWith('instanceAi:'));
+		expect(new Set(use)).toEqual(new Set(memberInstanceAiScopes));
+	});
+
+	it('exposes instance-level MCP scopes as their own use/manage options', () => {
+		const { 'Mcp use': use, 'Mcp manage': manage } = GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.settings;
+
+		expect(use).toContain('mcp:oauth');
+		expect(use).toContain('mcpApiKey:create');
+		expect(use).toContain('mcpApiKey:rotate');
+		expect(manage).toContain('mcp:manage');
+		expect(manage).toContain('mcp:oauth');
+		expect(manage).toContain('mcpApiKey:create');
+		expect(manage).toContain('mcpApiKey:rotate');
+	});
+
+	it('includes MCP and AI Assistant scopes in the general settings.Manage bundle, as a superset of their own options', () => {
 		const bundle = GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.settings.Manage;
 
-		expect(bundle).toContain('mcp:manage');
-		expect(bundle).toContain('mcp:oauth');
-		expect(bundle).toContain('mcpApiKey:create');
-		expect(bundle).toContain('mcpApiKey:rotate');
+		for (const scope of [
+			'mcp:manage',
+			'mcp:oauth',
+			'mcpApiKey:create',
+			'mcpApiKey:rotate',
+			'aiAssistant:manage',
+			'instanceAi:manage',
+			'instanceAi:message',
+			'instanceAi:gateway',
+		]) {
+			expect(bundle).toContain(scope);
+		}
+	});
+
+	it('exposes "Users: View" as exactly user:list, matching GLOBAL_MEMBER_SCOPES', () => {
+		// "Users: View" is granted to every instance role by default (see
+		// instanceRoleScopes.ts). It must never exceed what the built-in Member
+		// role already has, or a custom role mirroring Member ends up more
+		// privileged than Member itself
+		expect(GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.user.View).toEqual(['user:list']);
+		for (const scope of GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.user.View) {
+			expect(GLOBAL_MEMBER_SCOPES).toContain(scope);
+		}
 	});
 });
diff --git a/packages/@n8n/permissions/src/roles/custom-role-scopes.ee.ts b/packages/@n8n/permissions/src/roles/custom-role-scopes.ee.ts
index f18a836709c..b09fa4aac1d 100644
--- a/packages/@n8n/permissions/src/roles/custom-role-scopes.ee.ts
+++ b/packages/@n8n/permissions/src/roles/custom-role-scopes.ee.ts
@@ -73,8 +73,12 @@ type InstanceScopeGroups = {
 
 export const GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS = {
 	settings: {
-		// Grants access to every instance Settings page. Each scope below gates a
-		// specific page; granting all of them lets the role see and manage all of them.
+		// Grants access to every instance Settings page, including MCP and AI
+		// Assistant management. MCP and AI Assistant also have their own narrower
+		// use/manage options below so a role can be given just those without the
+		// rest of instance Settings — Manage's bundle is a strict superset of all
+		// four, so checking Manage checks them too, and unchecking any one of them
+		// drops Manage out of the fully-checked state.
 		Manage: [
 			'securitySettings:manage', // Security & Policies
 			'credentialResolver:read', // Resolvers (requires the full CRUD set)
@@ -103,13 +107,31 @@ export const GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS = {
 			'aiAssistant:manage', // AI Assistant
 			'instanceAi:manage',
 			'instanceAi:message',
+			'instanceAi:gateway', // computer-use gateway pairing
 			'mcp:manage', // Instance-level MCP
 			'mcp:oauth', // MCP OAuth clients
 			'mcpApiKey:create', // MCP personal API key
 			'mcpApiKey:rotate',
 		],
+		'Mcp use': ['mcp:oauth', 'mcpApiKey:create', 'mcpApiKey:rotate'],
+		'Mcp manage': ['mcp:manage', 'mcp:oauth', 'mcpApiKey:create', 'mcpApiKey:rotate'],
+		'AiAssistant use': ['instanceAi:message', 'instanceAi:gateway'],
+		'AiAssistant manage': [
+			'aiAssistant:manage',
+			'instanceAi:manage',
+			'instanceAi:message',
+			'instanceAi:gateway',
+		],
 	},
 	user: {
+		// Lets a role look up other users (e.g. the member-search box a Project Admin
+		// uses to add users to a project) without granting the Settings > Users page
+		// or the ability to change anyone's role. Only `user:list` — the scope the
+		// search endpoint actually checks — matches GLOBAL_MEMBER_SCOPES exactly, so
+		// a custom role built to mirror Member never ends up with more than Member.
+		// `user:read` only gates the Public API's single-user lookup, which Member
+		// doesn't have either, so it stays out of this bundle.
+		View: ['user:list'],
 		Manage: [
 			'user:create',
 			'user:update',
diff --git a/packages/frontend/@n8n/i18n/src/locales/en.json b/packages/frontend/@n8n/i18n/src/locales/en.json
index 92a8e6cd4b9..38dff4ec195 100644
--- a/packages/frontend/@n8n/i18n/src/locales/en.json
+++ b/packages/frontend/@n8n/i18n/src/locales/en.json
@@ -3013,8 +3013,19 @@
 	"instanceRoles.option.manageAll": "Manage others",
 	"instanceRoles.option.manageProjectRoles": "Manage project roles",
 	"instanceRoles.option.manageAllRoles": "Manage all roles (instance and project)",
+	"instanceRoles.option.manageAllSettings": "Manage all settings",
+	"instanceRoles.option.mcpUse": "MCP use",
+	"instanceRoles.option.mcpManage": "MCP manage",
+	"instanceRoles.option.aiAssistantUse": "AI assistant use",
+	"instanceRoles.option.aiAssistantManage": "AI assistant manage",
 	"instanceRoles.option.includedIn": "Included in {option}",
+	"instanceRoles.option.mandatory": "Every role can look up other users",
 	"instanceRoles.description.settings.manage": "View and change instance-wide settings",
+	"instanceRoles.description.settings.mcpUse": "Connect MCP clients and agents to the instance",
+	"instanceRoles.description.settings.mcpManage": "Enable or disable instance-level MCP and manage which workflows and agents are exposed",
+	"instanceRoles.description.settings.aiAssistantUse": "Use the AI assistant",
+	"instanceRoles.description.settings.aiAssistantManage": "Enable or disable the AI assistant and manage its settings",
+	"instanceRoles.description.user.view": "Look up other users, e.g. to search for and add project members",
 	"instanceRoles.description.user.manage": "Invite, remove, and update users across the instance",
 	"instanceRoles.description.role.manageProjectRoles": "Create, edit, and delete custom project roles only",
 	"instanceRoles.description.role.manage": "Create, edit, and delete all custom roles (instance and project).",
diff --git a/packages/frontend/editor-ui/src/features/roles/composables/useRoleEditorForm.ts b/packages/frontend/editor-ui/src/features/roles/composables/useRoleEditorForm.ts
index 84e17a01136..226c200d9c0 100644
--- a/packages/frontend/editor-ui/src/features/roles/composables/useRoleEditorForm.ts
+++ b/packages/frontend/editor-ui/src/features/roles/composables/useRoleEditorForm.ts
@@ -25,10 +25,18 @@ export interface UseRoleEditorFormOptions {
 	defaultScopes?: () => string[];
 	/**
 	 * Filter applied to every scope set entering the form (default seed, fetched role,
-	 * reset). Keeps the editor — and anything it saves — limited to scopes it exposes,
-	 * so a role loaded with non-assignable scopes is sanitized rather than forwarded.
+	 * reset) and to the persisted snapshot. Keeps the editor — and anything it saves —
+	 * limited to scopes it exposes, so a role loaded with non-assignable scopes is
+	 * sanitized rather than forwarded. Must only strip; adding scopes here would
+	 * rewrite `initialState` and hide the difference from what is stored.
 	 */
 	filterScopes?: (scopes: string[]) => string[];
+	/**
+	 * Applied to form scopes after `filterScopes`, but not to `initialState`.
+	 * Inject required scopes that should persist on the next save without treating
+	 * a legacy role as already up to date.
+	 */
+	ensureScopes?: (scopes: string[]) => string[];
 	/** Error message shown when the initial role fetch fails. */
 	fetchError: string;
 }
@@ -38,6 +46,7 @@ export function useRoleEditorForm({
 	viewRoute,
 	defaultScopes,
 	filterScopes,
+	ensureScopes,
 	fetchError,
 }: UseRoleEditorFormOptions) {
 	const rolesStore = useRolesStore();
@@ -60,10 +69,13 @@ export function useRoleEditorForm({
 	const sanitizeScopes = (scopes: string[]): string[] =>
 		filterScopes ? filterScopes(scopes) : scopes;
 
+	const formScopes = (scopes: string[]): string[] =>
+		ensureScopes ? ensureScopes(sanitizeScopes(scopes)) : sanitizeScopes(scopes);
+
 	const defaultForm = (): RoleEditorForm => ({
 		displayName: '',
 		description: '',
-		scopes: sanitizeScopes(defaultScopes?.() ?? []),
+		scopes: formScopes(defaultScopes?.() ?? []),
 	});
 
 	const initialState = ref<Role | undefined>();
@@ -77,13 +89,14 @@ export function useRoleEditorForm({
 
 			try {
 				const role = await rolesStore.fetchRoleBySlug({ slug });
-				const scopes = sanitizeScopes(role.scopes);
-				// Sanitize initialState too so the form isn't falsely dirty on load.
-				initialState.value = structuredClone({ ...role, scopes });
+				// Snapshot is stripped only. Required scopes go on the form so a stored
+				// role missing them stays unsaved until the next save.
+				const persistedScopes = sanitizeScopes(role.scopes);
+				initialState.value = structuredClone({ ...role, scopes: persistedScopes });
 				return {
 					displayName: role.displayName,
 					description: role.description,
-					scopes,
+					scopes: formScopes(role.scopes),
 				};
 			} catch (error) {
 				showError(error, fetchError);
@@ -149,7 +162,7 @@ export function useRoleEditorForm({
 			? {
 					displayName: payload.displayName,
 					description: payload.description,
-					scopes: sanitizeScopes(payload.scopes),
+					scopes: formScopes(payload.scopes),
 				}
 			: defaultForm();
 	}
diff --git a/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.test.ts b/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.test.ts
index 7480d119e5e..fc5554b1485 100644
--- a/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.test.ts
+++ b/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.test.ts
@@ -42,7 +42,7 @@ const mockCustomRole = {
 	displayName: 'Support',
 	slug: 'support',
 	description: 'A custom instance role',
-	scopes: ['user:read', 'user:list'],
+	scopes: ['user:list'],
 	licensed: true,
 	systemRole: false,
 	roleType: 'global' as const,
@@ -95,7 +95,8 @@ describe('InstanceRoleView', () => {
 				expect(rolesStore.createRole).toHaveBeenCalledWith({
 					displayName: 'Support',
 					description: '',
-					scopes: [],
+					// "Users: View" is mandatory on every instance role — see instanceRoleScopes.ts.
+					scopes: ['user:list'],
 					roleType: 'global',
 				});
 			});
@@ -189,7 +190,7 @@ describe('InstanceRoleView', () => {
 				expect(rolesStore.updateRole).toHaveBeenCalledWith('support', {
 					displayName: 'Support 2',
 					description: 'A custom instance role',
-					scopes: ['user:read', 'user:list'],
+					scopes: ['user:list'],
 				});
 			});
 			expect(mockShowMessage).toHaveBeenCalledWith({
@@ -225,7 +226,7 @@ describe('InstanceRoleView', () => {
 				expect(rolesStore.updateRole).toHaveBeenCalledWith('support', {
 					displayName: 'Support 2',
 					description: 'A custom instance role',
-					scopes: ['user:read', 'user:list'],
+					scopes: ['user:list'],
 				});
 			});
 		});
@@ -301,6 +302,66 @@ describe('InstanceRoleView', () => {
 			await waitFor(() => expect(rolesStore.updateRole).toHaveBeenCalled());
 		});
 
+		it('does not mark a role unsaved when Users: View is already stored', async () => {
+			rolesStore.fetchRoleBySlug.mockResolvedValue(mockCustomRole);
+
+			const { getByRole, container } = renderComponent({ props: { roleSlug: 'support' } });
+
+			await waitFor(() => {
+				const { nameInput } = getFormElements(container);
+				expect(nameInput?.value).toBe('Support');
+			});
+
+			expect(getByRole('button', { name: 'Save' })).toBeDisabled();
+		});
+
+		it('does not mark a role unsaved when only non-editor scopes were stripped', async () => {
+			rolesStore.fetchRoleBySlug.mockResolvedValue({
+				...mockCustomRole,
+				scopes: ['user:list', 'workflow:read'],
+			});
+
+			const { getByRole, container } = renderComponent({ props: { roleSlug: 'support' } });
+
+			await waitFor(() => {
+				const { nameInput } = getFormElements(container);
+				expect(nameInput?.value).toBe('Support');
+			});
+
+			expect(getByRole('button', { name: 'Save' })).toBeDisabled();
+		});
+
+		it('enables save when a stored role is missing mandatory Users: View scopes', async () => {
+			const legacyRole = {
+				...mockCustomRole,
+				scopes: ['tag:read', 'tag:list', 'tag:create', 'tag:update', 'tag:delete'],
+			};
+			rolesStore.fetchRoleBySlug.mockResolvedValue(legacyRole);
+			rolesStore.updateRole.mockResolvedValueOnce({
+				...legacyRole,
+				scopes: [...legacyRole.scopes, 'user:list'],
+			});
+
+			const { getByRole, getByTestId } = renderComponent({ props: { roleSlug: 'support' } });
+
+			await waitFor(() => {
+				expect(getByTestId('scope-option-user-view').getAttribute('aria-checked')).toBe('true');
+			});
+
+			const save = getByRole('button', { name: 'Save' });
+			expect(save).toBeEnabled();
+
+			await userEvent.click(save);
+
+			await waitFor(() => {
+				expect(rolesStore.updateRole).toHaveBeenCalledWith('support', {
+					displayName: 'Support',
+					description: 'A custom instance role',
+					scopes: ['tag:read', 'tag:list', 'tag:create', 'tag:update', 'tag:delete', 'user:list'],
+				});
+			});
+		});
+
 		it('falls back to the count from page load when the pre-save fetch fails', async () => {
 			rolesStore.fetchRoleBySlug
 				.mockResolvedValueOnce({ ...mockCustomRole, usedByUsers: 8 })
diff --git a/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.vue b/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.vue
index 283ceccb629..5ab04ebb4fc 100644
--- a/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.vue
+++ b/packages/frontend/editor-ui/src/features/roles/instance/InstanceRoleView.vue
@@ -17,7 +17,7 @@ import { useRoleEditorForm } from '../composables/useRoleEditorForm';
 import InstanceRoleAssignmentsTab from './InstanceRoleAssignmentsTab.vue';
 import DeleteInstanceRoleModal from './components/DeleteInstanceRoleModal.vue';
 import ScopeGroupSelector from './components/ScopeGroupSelector.vue';
-import { ALL_INSTANCE_SCOPES } from './instanceRoleScopes';
+import { ALL_INSTANCE_SCOPES, withMandatoryInstanceScopes } from './instanceRoleScopes';
 
 const rolesStore = useRolesStore();
 const router = useRouter();
@@ -50,6 +50,7 @@ const {
 	viewRoute: VIEWS.INSTANCE_ROLE_VIEW,
 	filterScopes: (scopes) =>
 		scopes.filter((s) => (ALL_INSTANCE_SCOPES as readonly string[]).includes(s)),
+	ensureScopes: withMandatoryInstanceScopes,
 	fetchError: i18n.baseText('roles.instance.action.fetch.error'),
 });
 
@@ -92,8 +93,10 @@ function setPreset(slug: string) {
 
 	// Only keep scopes the editor knows about; system roles may carry internal scopes
 	// (e.g. chatHub:*) that the UI doesn't expose and shouldn't be silently forwarded.
-	form.value.scopes = structuredClone(toRaw(preset.scopes)).filter((s) =>
-		(ALL_INSTANCE_SCOPES as readonly string[]).includes(s),
+	form.value.scopes = withMandatoryInstanceScopes(
+		structuredClone(toRaw(preset.scopes)).filter((s) =>
+			(ALL_INSTANCE_SCOPES as readonly string[]).includes(s),
+		),
 	);
 }
 
diff --git a/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.test.ts b/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.test.ts
index 32da7dcc526..e4a74cfb594 100644
--- a/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.test.ts
+++ b/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.test.ts
@@ -179,4 +179,108 @@ describe('ScopeGroupSelector', () => {
 			);
 		});
 	});
+
+	describe('settings "Manage all settings" select-all behaviour', () => {
+		it('checks MCP and AI Assistant use/manage when "Manage all settings" is toggled on', async () => {
+			const { getByTestId, emitted } = renderComponent(ScopeGroupSelector, {
+				props: { modelValue: [] },
+			});
+
+			await userEvent.click(getByTestId('scope-option-settings-manage'));
+
+			await waitFor(() => expect(emitted()['update:modelValue']).toBeTruthy());
+			const [scopes] = emitted()['update:modelValue'][0] as [string[]];
+			expect(scopes).toEqual(
+				expect.arrayContaining([
+					'mcp:manage',
+					'mcp:oauth',
+					'mcpApiKey:create',
+					'mcpApiKey:rotate',
+					'aiAssistant:manage',
+					'instanceAi:manage',
+					'instanceAi:message',
+				]),
+			);
+		});
+
+		it('keeps all four MCP/AI Assistant checkboxes enabled (not implied) when "Manage all settings" is checked', () => {
+			const { getByTestId } = renderComponent(ScopeGroupSelector, {
+				props: { modelValue: [...INSTANCE_SCOPE_GROUPS.settings.Manage] },
+			});
+			for (const testId of [
+				'scope-option-settings-mcp-use',
+				'scope-option-settings-mcp-manage',
+				'scope-option-settings-aiassistant-use',
+				'scope-option-settings-aiassistant-manage',
+			]) {
+				const checkbox = getByTestId(testId);
+				expect(checkbox.getAttribute('aria-checked')).toBe('true');
+				expect(checkbox.hasAttribute('disabled')).toBe(false);
+			}
+		});
+
+		it('unchecking "Mcp use" (not just "Mcp manage") turns "Manage all settings" off', async () => {
+			const { getByTestId, emitted, rerender } = renderComponent(ScopeGroupSelector, {
+				props: { modelValue: [...INSTANCE_SCOPE_GROUPS.settings.Manage] },
+			});
+
+			await userEvent.click(getByTestId('scope-option-settings-mcp-use'));
+
+			await waitFor(() => expect(emitted()['update:modelValue']).toBeTruthy());
+			const [scopes] = emitted()['update:modelValue'][0] as [string[]];
+			expect(scopes).not.toContain('mcp:oauth');
+			expect(scopes).toContain('securitySettings:manage');
+
+			// v-model doesn't auto-sync in tests — re-render with the emitted value to
+			// prove the effect the title claims: the checkbox itself loses its checked state.
+			await rerender({ modelValue: scopes });
+			expect(getByTestId('scope-option-settings-manage').getAttribute('aria-checked')).not.toBe(
+				'true',
+			);
+		});
+
+		it('unchecking "Mcp manage" turns "Manage all settings" off while "Manage all settings" was checked', async () => {
+			const { getByTestId, emitted, rerender } = renderComponent(ScopeGroupSelector, {
+				props: { modelValue: [...INSTANCE_SCOPE_GROUPS.settings.Manage] },
+			});
+
+			await userEvent.click(getByTestId('scope-option-settings-mcp-manage'));
+
+			await waitFor(() => expect(emitted()['update:modelValue']).toBeTruthy());
+			const [scopes] = emitted()['update:modelValue'][0] as [string[]];
+			expect(scopes).not.toContain('mcp:manage');
+			expect(scopes).toContain('securitySettings:manage');
+
+			await rerender({ modelValue: scopes });
+			expect(getByTestId('scope-option-settings-manage').getAttribute('aria-checked')).not.toBe(
+				'true',
+			);
+		});
+	});
+
+	describe('mandatory "Users: View" option', () => {
+		// The caller (InstanceRoleView's `withMandatoryInstanceScopes`) is what
+		// guarantees these scopes are always in `modelValue` — the selector itself
+		// stays a pure function of its props, same as every other option.
+		const withUserView = [...INSTANCE_SCOPE_GROUPS.user.View];
+
+		it('renders checked and disabled', () => {
+			const { getByTestId } = renderComponent(ScopeGroupSelector, {
+				props: { modelValue: withUserView },
+			});
+			const userView = getByTestId('scope-option-user-view');
+			expect(userView.getAttribute('aria-checked')).toBe('true');
+			expect(userView.hasAttribute('disabled')).toBe(true);
+		});
+
+		it('does not emit an update when clicked', async () => {
+			const { getByTestId, emitted } = renderComponent(ScopeGroupSelector, {
+				props: { modelValue: withUserView },
+			});
+
+			await userEvent.click(getByTestId('scope-option-user-view'));
+
+			expect(emitted()['update:modelValue']).toBeFalsy();
+		});
+	});
 });
diff --git a/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.vue b/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.vue
index 184c0fd9260..17d51d8d260 100644
--- a/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.vue
+++ b/packages/frontend/editor-ui/src/features/roles/instance/components/ScopeGroupSelector.vue
@@ -8,8 +8,10 @@ import {
 	SUPERSEDED_BY,
 	getEscalationWarningKey,
 	isOptionImplied,
+	isOptionMandatory,
 	resolveOptionState,
 	toggleOptionInGroup,
+	type InstanceResource,
 	type InstanceScopeOption,
 } from '../instanceRoleScopes';
 
@@ -48,12 +50,21 @@ function impliedTooltip(option: InstanceScopeOption, groupOptions: InstanceScope
 /**
  * Tooltip shown for a permission option. When the option is implied by another
  * (e.g. "Manage own" under a checked "Manage all") the "Included in …" note
- * takes precedence; otherwise it explains what the permission grants.
+ * takes precedence; a mandatory option (granted to every role, see
+ * `isOptionMandatory`) explains why it can't be turned off; otherwise it
+ * explains what the permission grants.
  */
-function optionTooltip(option: InstanceScopeOption, groupOptions: InstanceScopeOption[]): string {
+function optionTooltip(
+	resource: InstanceResource,
+	option: InstanceScopeOption,
+	groupOptions: InstanceScopeOption[],
+): string {
 	if (isOptionImplied(option, groupOptions, props.modelValue)) {
 		return impliedTooltip(option, groupOptions);
 	}
+	if (isOptionMandatory(resource, option)) {
+		return i18n.baseText('instanceRoles.option.mandatory');
+	}
 	return option.descriptionKey ? i18n.baseText(option.descriptionKey) : '';
 }
 
@@ -76,8 +87,8 @@ function onToggle(option: InstanceScopeOption, groupOptions: InstanceScopeOption
 					<N8nTooltip
 						v-for="option in group.options"
 						:key="option.key"
-						:content="optionTooltip(option, group.options)"
-						:disabled="!optionTooltip(option, group.options)"
+						:content="optionTooltip(group.resource, option, group.options)"
+						:disabled="!optionTooltip(group.resource, option, group.options)"
 						placement="right"
 						:enterable="false"
 						:show-after="250"
@@ -89,7 +100,11 @@ function onToggle(option: InstanceScopeOption, groupOptions: InstanceScopeOption
 							:indeterminate="
 								resolveOptionState(option, group.options, modelValue) === 'indeterminate'
 							"
-							:disabled="readonly || isOptionImplied(option, group.options, modelValue)"
+							:disabled="
+								readonly ||
+								isOptionImplied(option, group.options, modelValue) ||
+								isOptionMandatory(group.resource, option)
+							"
 							:class="$style.checkbox"
 							@update:model-value="onToggle(option, group.options)"
 						/>
diff --git a/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.test.ts b/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.test.ts
index db297e8485c..e498655be4b 100644
--- a/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.test.ts
+++ b/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.test.ts
@@ -7,8 +7,10 @@ import {
 	getOptionState,
 	getEscalationWarningKey,
 	isOptionImplied,
+	isOptionMandatory,
 	resolveOptionState,
 	toggleOptionInGroup,
+	withMandatoryInstanceScopes,
 } from './instanceRoleScopes';
 
 const ALL_SCOPES_SET = new Set<string>(ALL_SCOPES as string[]);
@@ -81,7 +83,13 @@ describe('instanceRoleScopes config', () => {
 			expect(Object.keys(INSTANCE_SCOPE_GROUPS.tag)).toEqual(['Manage']);
 			expect(Object.keys(INSTANCE_SCOPE_GROUPS.role)).toEqual(['Manage project roles', 'Manage']);
 			expect(Object.keys(INSTANCE_SCOPE_GROUPS.project)).toEqual(['Create']);
-			expect(Object.keys(INSTANCE_SCOPE_GROUPS.settings)).toEqual(['Manage']);
+			expect(Object.keys(INSTANCE_SCOPE_GROUPS.settings)).toEqual([
+				'Manage',
+				'Mcp use',
+				'Mcp manage',
+				'AiAssistant use',
+				'AiAssistant manage',
+			]);
 		});
 	});
 });
@@ -236,6 +244,10 @@ describe('getEscalationWarningKey', () => {
 	it('returns undefined for role when only the non-escalating role:read scope is present', () => {
 		expect(getEscalationWarningKey('role', ['role:read'])).toBeUndefined();
 	});
+
+	it('returns undefined for user when only the non-escalating View scope (user:list) is present', () => {
+		expect(getEscalationWarningKey('user', ['user:list'])).toBeUndefined();
+	});
 });
 
 describe('toggleOptionInGroup', () => {
@@ -293,4 +305,84 @@ describe('toggleOptionInGroup', () => {
 		toggleOptionInGroup(input, manageAll, apiKeyGroup.options);
 		expect(input).toEqual([...manageAll.scopes]);
 	});
+
+	describe('settings "Manage all settings" acts as a select-all over MCP/AI Assistant', () => {
+		const settingsGroup = INSTANCE_SCOPE_GROUP_LIST.find((g) => g.resource === 'settings')!;
+		const manageAllSettings = settingsGroup.options.find((o) => o.key === 'Manage')!;
+		const mcpUse = settingsGroup.options.find((o) => o.key === 'Mcp use')!;
+		const mcpManage = settingsGroup.options.find((o) => o.key === 'Mcp manage')!;
+		const aiAssistantUse = settingsGroup.options.find((o) => o.key === 'AiAssistant use')!;
+		const aiAssistantManage = settingsGroup.options.find((o) => o.key === 'AiAssistant manage')!;
+
+		it('checking "Manage all settings" checks MCP and AI Assistant use/manage too', () => {
+			const scopes = toggleOptionInGroup([], manageAllSettings, settingsGroup.options);
+			expect(getOptionState(scopes, mcpUse.scopes)).toBe('checked');
+			expect(getOptionState(scopes, mcpManage.scopes)).toBe('checked');
+			expect(getOptionState(scopes, aiAssistantUse.scopes)).toBe('checked');
+			expect(getOptionState(scopes, aiAssistantManage.scopes)).toBe('checked');
+		});
+
+		it('all four MCP/AI Assistant options stay independently toggleable while "Manage all settings" is checked (none implied/disabled by it)', () => {
+			// Unlike apiKey's "Manage own"/"Manage all" tiering, none of these four
+			// are superseded by another option in this group — "Manage all settings"
+			// checks them via plain scope-superset arithmetic, not implication, so
+			// unchecking any one of the four must stay a single, direct click.
+			const scopes = toggleOptionInGroup([], manageAllSettings, settingsGroup.options);
+			expect(isOptionImplied(mcpUse, settingsGroup.options, scopes)).toBe(false);
+			expect(isOptionImplied(mcpManage, settingsGroup.options, scopes)).toBe(false);
+			expect(isOptionImplied(aiAssistantUse, settingsGroup.options, scopes)).toBe(false);
+			expect(isOptionImplied(aiAssistantManage, settingsGroup.options, scopes)).toBe(false);
+		});
+
+		it('unchecking "Mcp manage" while "Manage all settings" is checked drops it out of the checked state', () => {
+			const fullyChecked = toggleOptionInGroup([], manageAllSettings, settingsGroup.options);
+			const afterUncheck = toggleOptionInGroup(fullyChecked, mcpManage, settingsGroup.options);
+			expect(resolveOptionState(manageAllSettings, settingsGroup.options, afterUncheck)).not.toBe(
+				'checked',
+			);
+			// The rest of the "Manage all settings" bundle survives the uncheck.
+			expect(afterUncheck).toContain('securitySettings:manage');
+		});
+
+		it('unchecking "AiAssistant use" while "Manage all settings" is checked drops it out of the checked state', () => {
+			const fullyChecked = toggleOptionInGroup([], manageAllSettings, settingsGroup.options);
+			const afterUncheck = toggleOptionInGroup(fullyChecked, aiAssistantUse, settingsGroup.options);
+			expect(resolveOptionState(manageAllSettings, settingsGroup.options, afterUncheck)).not.toBe(
+				'checked',
+			);
+		});
+	});
+});
+
+describe('mandatory instance options', () => {
+	const userGroup = INSTANCE_SCOPE_GROUP_LIST.find((g) => g.resource === 'user')!;
+	const userView = userGroup.options.find((o) => o.key === 'View')!;
+	const userManage = userGroup.options.find((o) => o.key === 'Manage')!;
+
+	it('flags "Users: View" as mandatory and every other option as not', () => {
+		expect(isOptionMandatory('user', userView)).toBe(true);
+		expect(isOptionMandatory('user', userManage)).toBe(false);
+
+		for (const group of INSTANCE_SCOPE_GROUP_LIST) {
+			for (const option of group.options) {
+				if (group.resource === 'user' && option.key === 'View') continue;
+				expect(isOptionMandatory(group.resource, option)).toBe(false);
+			}
+		}
+	});
+
+	it('withMandatoryInstanceScopes adds "Users: View" scopes to an empty list', () => {
+		expect(new Set(withMandatoryInstanceScopes([]))).toEqual(new Set(userView.scopes));
+	});
+
+	it('withMandatoryInstanceScopes does not duplicate scopes already present', () => {
+		const withDuplicate = withMandatoryInstanceScopes(['user:list', 'tag:read']);
+		expect(withDuplicate.filter((s) => s === 'user:list')).toHaveLength(1);
+		expect(withDuplicate).toEqual(expect.arrayContaining(['user:list', 'tag:read']));
+	});
+
+	it('withMandatoryInstanceScopes preserves unrelated scopes untouched', () => {
+		const result = withMandatoryInstanceScopes(['tag:read', 'tag:list']);
+		expect(result).toEqual(expect.arrayContaining(['tag:read', 'tag:list', ...userView.scopes]));
+	});
 });
diff --git a/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.ts b/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.ts
index 51c6f9ade0e..5c7866c130d 100644
--- a/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.ts
+++ b/packages/frontend/editor-ui/src/features/roles/instance/instanceRoleScopes.ts
@@ -46,6 +46,10 @@ export const INSTANCE_OPTION_LABEL_KEYS: Record<string, BaseTextKey> = {
 	'Manage own': 'instanceRoles.option.manageOwn',
 	'Manage all': 'instanceRoles.option.manageAll',
 	'Manage project roles': 'instanceRoles.option.manageProjectRoles',
+	'Mcp use': 'instanceRoles.option.mcpUse',
+	'Mcp manage': 'instanceRoles.option.mcpManage',
+	'AiAssistant use': 'instanceRoles.option.aiAssistantUse',
+	'AiAssistant manage': 'instanceRoles.option.aiAssistantManage',
 };
 
 /**
@@ -57,6 +61,7 @@ export const INSTANCE_OPTION_LABEL_OVERRIDES: Partial<
 	Record<InstanceResource, Record<string, BaseTextKey>>
 > = {
 	role: { Manage: 'instanceRoles.option.manageAllRoles' },
+	settings: { Manage: 'instanceRoles.option.manageAllSettings' },
 };
 
 /**
@@ -67,8 +72,17 @@ export const INSTANCE_OPTION_LABEL_OVERRIDES: Partial<
 export const INSTANCE_OPTION_DESCRIPTION_KEYS: Partial<
 	Record<InstanceResource, Record<string, BaseTextKey>>
 > = {
-	settings: { Manage: 'instanceRoles.description.settings.manage' },
-	user: { Manage: 'instanceRoles.description.user.manage' },
+	settings: {
+		Manage: 'instanceRoles.description.settings.manage',
+		'Mcp use': 'instanceRoles.description.settings.mcpUse',
+		'Mcp manage': 'instanceRoles.description.settings.mcpManage',
+		'AiAssistant use': 'instanceRoles.description.settings.aiAssistantUse',
+		'AiAssistant manage': 'instanceRoles.description.settings.aiAssistantManage',
+	},
+	user: {
+		View: 'instanceRoles.description.user.view',
+		Manage: 'instanceRoles.description.user.manage',
+	},
 	role: {
 		'Manage project roles': 'instanceRoles.description.role.manageProjectRoles',
 		Manage: 'instanceRoles.description.role.manage',
@@ -87,6 +101,10 @@ export const INSTANCE_OPTION_ORDER: string[] = [
 	'View',
 	'Create',
 	'Manage project roles',
+	'Mcp use',
+	'Mcp manage',
+	'AiAssistant use',
+	'AiAssistant manage',
 	'Manage',
 	'Manage own',
 	'Manage all',
@@ -137,6 +155,24 @@ export const ALL_INSTANCE_SCOPES: Scope[] = [
 	...new Set(INSTANCE_SCOPE_GROUP_LIST.flatMap((g) => g.options.flatMap((o) => o.scopes))),
 ];
 
+/**
+ * "Users: View" is baseline behavior every instance role carries — the default
+ * Member role already has it — not something a custom role can opt out of.
+ * Rendered checked and disabled in the editor. `withMandatoryInstanceScopes`
+ * is applied to the form (and on save), not the persisted snapshot, so a
+ * stored role that is missing these scopes stays unsaved until the next save.
+ */
+export function isOptionMandatory(resource: InstanceResource, option: InstanceScopeOption) {
+	return resource === 'user' && option.key === 'View';
+}
+
+const MANDATORY_INSTANCE_SCOPES: readonly Scope[] = GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.user.View;
+
+/** Unions in the mandatory scopes (see `isOptionMandatory`) on top of an already-filtered scope list. */
+export function withMandatoryInstanceScopes(scopes: readonly string[]): string[] {
+	return [...new Set([...scopes, ...MANDATORY_INSTANCE_SCOPES])];
+}
+
 export type OptionState = 'checked' | 'indeterminate' | 'unchecked';
 
 /**
@@ -148,6 +184,7 @@ export type OptionState = 'checked' | 'indeterminate' | 'unchecked';
 export const SUPERSEDED_BY: Partial<Record<string, string>> = {
 	'Manage own': 'Manage all',
 	'Manage project roles': 'Manage',
+	View: 'Manage',
 };
 
 /**
@@ -223,14 +260,16 @@ export function resolveOptionState(
 /**
  * Find the option that `option` supersedes within its group, if any. SUPERSEDED_BY
  * maps a sub-option to its superseding option, so the subordinate of a superseding
- * option is the key that points back to it.
+ * option is the key that points back to it. Different resources can reuse the same
+ * superseding key (e.g. "Manage" backs both role's "Manage project roles" and user's
+ * "View"), so the reverse lookup must only consider keys present in this group.
  */
 export function findSubordinateOption(
 	option: InstanceScopeOption,
 	groupOptions: InstanceScopeOption[],
 ): InstanceScopeOption | undefined {
 	const subordinateKey = Object.keys(SUPERSEDED_BY).find(
-		(key) => SUPERSEDED_BY[key] === option.key,
+		(key) => SUPERSEDED_BY[key] === option.key && groupOptions.some((o) => o.key === key),
 	);
 	return subordinateKey ? groupOptions.find((o) => o.key === subordinateKey) : undefined;
 }
@@ -266,6 +305,8 @@ export function toggleOptionInGroup(
 	return [...next];
 }
 
+const userViewScopes: ReadonlySet<Scope> = new Set(GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.user.View);
+
 /**
  * Resource groups whose scopes enable privilege escalation, with the warning to show.
  * Entries are checked in order; the first matching scope's message wins.
@@ -275,7 +316,11 @@ export const ESCALATION_WARNING_SCOPES: Partial<
 > = {
 	user: [
 		{
-			scopes: [...GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.user.Manage],
+			// Excludes View's `user:read`/`user:list` — looking users up isn't an
+			// escalation risk on its own, only Manage's write scopes are.
+			scopes: GLOBAL_CUSTOM_ROLE_SCOPE_GROUPS.user.Manage.filter(
+				(scope: Scope) => !userViewScopes.has(scope),
+			),
 			messageKey: 'instanceRoles.warning.manageMembers',
 		},
 	],