fix

app.py

@@ -60,7 +60,20 @@ def extract_youtube_details(url: str) -> str:
 
 @tool
 def extract_youtube_details(url: str) -> str:
-    """Extract details from YouTube videos."""
+    """
+    Extract details from a YouTube video URL.
+
+    This tool fetches video metadata (title, author, etc.) using the YouTube oEmbed API,
+    and scrapes the video page for additional details like bird species mentions and view count.
+
+    Args:
+        url (str): The full URL of a YouTube video (e.g., https://www.youtube.com/watch?v=VIDEO_ID).
+
+    Returns:
+        str: A formatted string containing extracted video information such as title, author, 
+             bird species count (if mentioned), and number of views.
+    """
+
     try:
         video_id = None
         patterns = [