diff --git a/contributing/samples/mcp_agent/agent.py b/contributing/samples/mcp_agent/agent.py
index 6f8dcca..660c98c 100755
--- a/contributing/samples/mcp_agent/agent.py
+++ b/contributing/samples/mcp_agent/agent.py
@@ -34,11 +34,22 @@ root_agent = LlmAgent(
                 ],
             ),
             # don't want agent to do write operation
+            # you can also do below
+            # tool_filter=lambda tool, ctx=None: tool.name
+            # not in [
+            #     'write_file',
+            #     'edit_file',
+            #     'create_directory',
+            #     'move_file',
+            # ],
             tool_filter=[
-                'write_file',
-                'edit_file',
-                'create_directory',
-                'move_file',
+                'read_file',
+                'read_multiple_files',
+                'list_directory',
+                'directory_tree',
+                'search_files',
+                'get_file_info',
+                'list_allowed_directories',
             ],
         )
     ],