Single tool with clear naming (get_youtube_transcript) and good description (194 chars, within baseline 34-392 range). Input schema present with proper type and description. However, output schema is undocumented, LLMs cannot plan downstream operations or validate response structure. No error handling guidance (e.g., 'transcript unavailable, try another video'). Parameter description lacks format constraints (URL validation rules). No pagination, batching, or composition patterns evident. Tool is read-only and simple, but lacks production-grade error recovery and output documentation.

• Document output schema: specify that response is plain text (no structured fields), typical length range, and encoding. Example: 'Returns a single text field containing the full transcript as a continuous string (typically 500 - 10,000 words).'
• Add error recovery guidance to tool description: 'If transcript is unavailable (video is private, has no captions, or is age-restricted), the tool will return an error. Try searching for an alternative video or ask the user to provide a transcript URL.'
• Enhance parameter description with validation rules: 'The full URL of the YouTube video (supports both youtube.com and youtu.be formats). Must include the video ID (11 alphanumeric characters). Example: https://www.youtube.com/watch?v=dQw4w9WgXcQ'
• Implement timeout handling: wrap youtube-transcript.fetchTranscript() in a Promise.race() with a 30-second timeout, and return a clear error: 'Transcript fetch timed out after 30 seconds. The video may be unavailable or the service is slow. Try again in a moment.'
• Add error categorization to CallToolRequestSchema handler: distinguish between retryable errors (timeout, rate limit) and user-fixable errors (invalid URL, video not found) so LLM knows whether to retry or ask for clarification.