Update tool.py

tool.py

@@ -143,9 +143,9 @@ def analyze_excel_file(file_path: str, query: str) -> str:
 
 def extract_video_id(youtube_url: str) -> str | None:
     """Extract the video ID from a YouTube URL.
-    Supports standard and shortened formats like:
-    - https://www.youtube.com/watch?v=VIDEO_ID
-    - https://youtu.be/VIDEO_ID
+    
+    Args: 
+        youtube_url (str): Url of the youtube video. Supports standard and shortened formats like https://www.youtube.com/watch?v=VIDEO_ID and https://youtu.be/VIDEO_ID .
     """
     try:
         parsed_url = urlparse(youtube_url)