community: toolkits docstrings (#23286)

Added missed docstrings. Formatted docstrings to the consistent form.

---------

Co-authored-by: ccurme <chester.curme@gmail.com>

libs/community/langchain_community/agent_toolkits/load_tools.py

@@ -14,6 +14,7 @@ whether permissions of the given toolkit are appropriate for the application.
 
 See [Security](https://python.langchain.com/docs/security) for more information.
 """
+
 import warnings
 from typing import Any, Dict, List, Optional, Callable, Tuple