Update tool.py

tool.py

@@ -163,8 +163,9 @@ def extract_video_id(youtube_url: str) -> str | None:
 @tool
 def get_youtube_transcript(youtube_url: str) -> str:
     """Returns the transcript of a YouTube video as plain text.
-    Use this tool to extract spoken words from videos for Q&A, summarization,
-    or analysis. This does not include visual or on-screen content.
+    
+    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
     """
     video_id = extract_video_id(youtube_url)
     if not video_id: