feat(@angular/cli): add --local-only option to mcp command

This change introduces a `--local-only` flag to the `ng mcp` command. When this flag is present, the MCP server will only register tools that are explicitly marked as `isLocalOnly`.

This provides a way for host applications to connect to the Angular CLI MCP server in an offline or restricted environment, ensuring that no tools that require internet access are exposed.

Author: clydin

packages/angular/cli/src/commands/mcp/cli.ts

@@ -33,22 +33,32 @@ export default class McpCommandModule extends CommandModule implements CommandMo
   longDescriptionPath = undefined;
 
   builder(localYargs: Argv): Argv {
-    return localYargs.option('read-only', {
-      type: 'boolean',
-      default: false,
-      describe: 'Only register read-only tools.',
-    });
+    return localYargs
+      .option('read-only', {
+        type: 'boolean',
+        default: false,
+        describe: 'Only register read-only tools.',
+      })
+      .option('local-only', {
+        type: 'boolean',
+        default: false,
+        describe: 'Only register tools that do not require internet access.',
+      });
   }
 
-  async run(options: { readOnly: boolean }): Promise<void> {
+  async run(options: { readOnly: boolean; localOnly: boolean }): Promise<void> {
     if (isTTY()) {
       this.context.logger.info(INTERACTIVE_MESSAGE);
 
       return;
     }
 
     const server = await createMcpServer(
-      { workspace: this.context.workspace, readOnly: options.readOnly },
+      {
+        workspace: this.context.workspace,
+        readOnly: options.readOnly,
+        localOnly: options.localOnly,
+      },
       this.context.logger,
     );
     const transport = new StdioServerTransport();

packages/angular/cli/src/commands/mcp/mcp-server.ts

@@ -22,6 +22,7 @@ export async function createMcpServer(
   context: {
     workspace?: AngularWorkspace;
     readOnly?: boolean;
+    localOnly?: boolean;
   },
   logger: { warn(text: string): void },
 ): Promise<McpServer> {
@@ -56,6 +57,10 @@ export async function createMcpServer(
     toolDeclarations = toolDeclarations.filter((tool) => tool.isReadOnly);
   }
 
+  if (context.localOnly) {
+    toolDeclarations = toolDeclarations.filter((tool) => tool.isLocalOnly);
+  }
+
   await registerTools(
     server,
     {