Four tools with basic descriptions and input schemas present, but significant gaps in parameter documentation and output schema clarity. All tools are READ_ONLY and follow verb_noun naming (search_, get_). However, parameter descriptions are minimal (e.g., 'YouTube video ID or full video URL' lacks format constraints), and output schemas are not documented in the source. No error handling guidance visible. Tool descriptions average ~60 chars, below the 194-char baseline for A+ tools. Parameters lack type constraints (enums, ranges, patterns). No pagination documented despite tools returning lists.

• Document output schemas for all tools. E.g., search_videos should return [{video_id, title, channel_id, view_count, published_at}]. Include all fields downstream tools need.
• Add format constraints to parameter descriptions. E.g., 'maxResults: integer, 1 - 50 (default 10)' and 'videoID: 11-character YouTube ID or full URL (youtube.com/watch?v=... or youtu.be/...)'.
• Implement pagination for list-returning tools. Add offset/limit or cursor parameters; return total_count and next_cursor in responses.
• Expand tool descriptions to 100 - 200 chars. Include WHEN to use (e.g., 'Call this to find videos before fetching details'), prerequisites (e.g., 'Requires YOUTUBE_API_KEY'), and failure modes (e.g., 'Returns empty list if no matches').
• Add error recovery guidance. E.g., 'If video not found, try search_videos() with the title. If transcript unavailable, the video may not have captions enabled.'