Strong foundation with clear naming (verb_noun pattern), comprehensive parameter schemas using Zod, and good descriptions. Tool names are action-oriented (capture_*, list_*, download_*). All 7 tools have descriptions (avg ~120 chars) and input schemas with type constraints. However, output schemas are not formally documented in the code, responses are JSON-stringified but lack explicit schema declarations. Error handling returns actionable messages via errorResult(). Tool composition is sound: extract → compose workflow is well-designed. Minor gaps: some parameter descriptions could be more prescriptive about constraints (e.g., fps range 1-30 is in schema but not all descriptions emphasize it); no explicit idempotency guarantees stated.

• Document output schemas explicitly in tool registration. E.g., capture_metadata should declare it returns {duration: number, resolution: string, fps: number, codec: string}. Use Zod schemas for consistency.
• Clarify conditional parameter dependencies in descriptions. For capture_extract, state: 'width and quality only apply when preset=custom. When preset=llm or high, these are ignored.'
• Add idempotency hints to tool descriptions. E.g., 'Extracting frames from the same source with identical parameters produces identical output and is safe to retry.'
• Consider splitting capture_extract_and_compose into separate tools so agents can extract without composing, or compose without re-extracting. Offer a convenience wrapper if needed.
• Enhance error messages with recovery guidance. Instead of raw errors, return: 'Video duration 5400s exceeds limit of 3600s. Reduce FPS (currently 10) or trim the source video.'

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

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