This server exhibits moderate definition quality with clear tool naming and basic descriptions, but suffers from incomplete schemas, missing parameter descriptions in some tools, and inadequate error handling guidance. Of 4 tools, all have descriptions but parameter documentation is inconsistent. Schema completeness varies: transcribe_file and transcribe_audio have reasonable input schemas with types and descriptions, but transcribe_youtube lacks an enum constraint on the 'task' parameter (shows string instead of Literal). Output schemas are entirely undocumented across all tools. Error handling returns plain error strings rather than actionable recovery guidance. Tools average 3-4 parameters with defaults, which is appropriate, but the lack of structured output documentation is a significant gap for agent chaining.

• Document output schema for all tools. Replace string return with structured response: e.g., {"transcription": "...", "file_path": "...", "language": "...", "duration_seconds": number}. This enables agents to extract fields for downstream chaining (pattern:response-shaper).
• Fix transcribe_youtube 'task' parameter: change schema type from 'string' to enum ['transcribe', 'translate'] to match transcribe_file/transcribe_audio and prevent hallucination.
• Enhance error handling to return structured recovery guidance: instead of 'Error transcribing audio: <message>', return {"error": "<message>", "retryable": boolean, "next_step": "<recovery hint>"}. Classify errors as retryable (network timeout), user-fixable (invalid file format), or fatal (model load error).
• Expand tool descriptions to 100-150 chars with decision guidance: e.g., transcribe_audio should explain 'Use this to transcribe pre-recorded audio in base64 format. Requires audio data to be base64-encoded; see transcribe_file for file-based input.' This helps LLM select the right tool.
• Add parameter constraints documentation: language parameter should document valid ISO 639-1 codes (e.g., 'en', 'fr', 'es') with a note that unsupported codes may fall back to English. file_format should list supported formats (wav, mp3, m4a, ogg, flac).
• Implement idempotency guarantees: clarify whether repeated calls with identical parameters produce the same output file path or overwrite. Add idempotentHint to tool registration if applicable.
• Add validation error messages: catch ValueError for invalid language codes and return 'Invalid language code: {code}. Valid codes are ISO 639-1 (e.g., en, fr, es, de, etc.)' instead of generic exception.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry