16 tools with complete schemas and descriptions. Naming is action-verb consistent (send_*, set_*, trigger_*, play_*, reset_*). Descriptions are adequate (50-150 chars typical) but lack LLM-optimized guidance on WHEN to use each tool vs alternatives. Parameters are well-typed with ranges and defaults, but lack enum constraints where applicable (e.g., channel 1-16 should be constrained). Output schemas are not documented, LLMs cannot predict return structure. Error handling is minimal; no recovery guidance. Composition is sound (single responsibility per tool), but some tools combine multiple concerns (e.g., play_pattern_with_tracks_and_melody handles drums + melody + timing in one call, forcing the agent to construct complex nested arrays).

• Document output schemas for all tools. E.g., send_note returns {status: 'ok', note: int, velocity: int, duration: float, channel: int}. This enables LLMs to chain calls and extract relevant data.
• Enhance descriptions with WHEN guidance. E.g., send_note: 'Send a raw MIDI note. Use for chromatic melodies or ad-hoc notes. For drum track triggers, use trigger_track instead.'
• Add enum constraints to schema for bounded parameters: channel (1-16), track (1-8), step (1-64), velocity (0-127), note (0-127). This prevents invalid agent inputs.
• Split play_pattern_with_tracks_and_melody into play_drums and play_melody, or provide a helper function that constructs the nested array structure from simpler inputs.
• Add error recovery guidance: catch exceptions and return structured errors like {error: 'invalid_channel', message: 'Channel must be 1-16, got 20', retryable: false}. This guides agent retry logic.

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

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