feat(plan): implement support for MCP servers in Plan mode (#18229)

packages/core/src/tools/mcp-tool.ts

@@ -247,6 +247,7 @@ export class DiscoveredMCPTool extends BaseDeclarativeTool<
     override readonly parameterSchema: unknown,
     messageBus: MessageBus,
     readonly trust?: boolean,
+    readonly isReadOnly?: boolean,
     nameOverride?: string,
     private readonly cliConfig?: Config,
     override readonly extensionName?: string,
@@ -283,6 +284,7 @@ export class DiscoveredMCPTool extends BaseDeclarativeTool<
       this.parameterSchema,
       this.messageBus,
       this.trust,
+      this.isReadOnly,
       this.getFullyQualifiedName(),
       this.cliConfig,
       this.extensionName,