diff --git a/metagpt/tools/functions/libs/udf/__init__.py b/metagpt/tools/functions/libs/udf/__init__.py
index 0cada9545..8c74bbbe3 100644
--- a/metagpt/tools/functions/libs/udf/__init__.py
+++ b/metagpt/tools/functions/libs/udf/__init__.py
@@ -112,6 +112,6 @@ folder_path = str(Path(__file__).parent.absolute())
 function_signatures, function_returns = get_function_signatures_in_folder(folder_path)
 
 UDFS = [func for func in function_signatures
-        if not func['udf_name'].startswith(('extract_function_signatures', 'get_function_signatures_in_folder'))]
+        if not func['udf_name'].startswith(('extract_function_signatures', 'get_function_signatures_in_folder', 'docstring_to_yaml'))]
 
 UDFS_YAML = extract_function_schema_yaml_in_folder(folder_path)