Disallow Object.create() and reflect. (#22408)

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

@@ -233,6 +233,15 @@ export class ToolRegistry {
     return this.messageBus;
   }
 
+  /**
+   * Creates a shallow clone of the registry and its current known tools.
+   */
+  clone(): ToolRegistry {
+    const clone = new ToolRegistry(this.config, this.messageBus);
+    clone.allKnownTools = new Map(this.allKnownTools);
+    return clone;
+  }
+
   /**
    * Registers a tool definition.
    *