Two tools present. 'validate' is a trivial stub with empty schema and vague description (23 chars). 'summarize_youtube_video' has a proper schema with Zod validation and tool annotations, but description is verbose (280 chars) and lacks clarity on when/why to use it. Parameter descriptions are present but generic. No output schema documented. Error handling returns raw error strings without recovery guidance. Overall: below-average definitions with one functional tool and one placeholder.

• Remove or replace 'validate' tool. If it serves a real purpose (e.g., health check), rename to 'health_check' and document what it validates. If it's a stub, delete it.
• Document output schema for 'summarize_youtube_video': return structured object with fields like {subtitles: [{text, start_time, duration}], language: string, video_id: string, total_duration: number} instead of concatenated text.
• Rewrite error handling to include recovery guidance: 'Invalid video ID (got "abc", expected 11 chars). Try searching for the video title first with a search tool.' or 'Subtitles not available for this video in language "xx". Available languages: en, es, fr.'
• Reduce 'summarize_youtube_video' description to 100-150 chars: 'Retrieve captions and subtitles for a YouTube video. Returns structured subtitle data with timestamps. Use when a user provides a YouTube URL or asks about video content.'
• Convert 'lang' parameter from free-form string to enum of supported ISO 639-1 codes (en, es, fr, de, it, pt, ru, ja, zh, hi, etc.) to prevent invalid language requests.

Inferred effective spec: 2026-07-28+.

• Relies on Stateful initialize / Mcp-Session-Id (removed; protocol is stateless) - make each request self-contained