The server defines 4 tools with schemas and descriptions present. Tool names start with verbs (queue_, run_, stop_, play_) which is good. However, descriptions are concise but lack depth on error handling and recovery scenarios. Parameters are typed with Zod but some descriptions could be more actionable. Output schemas are not explicitly documented. The queue_segment and run_code tools are near-duplicates which violates single-responsibility. play_note has good parameter constraints (MIDI range 0-127). No tool annotation hints (readOnlyHint, destructiveHint) despite clear side effects.

• Remove run_code entirely or make it an alias without a separate tool registration. Keep queue_segment as the canonical tool and document the relationship clearly.
• Add tool annotations: mark queue_segment and run_code with destructiveHint=true; mark stop_all with destructiveHint=true and idempotentHint=false (irreversible, not retryable).
• Document output schemas explicitly. Change tool handlers to return structured objects with 'status', 'message', and 'timestamp' fields instead of bare text responses.
• Add parameter constraints for play_note.synth: either define an enum of valid synth names (:beep, :saw, :prophet, :sine, :dark_sea, etc.) or document where to find the list.
• Enhance error handling in sendCodeAsync() and sendStopAllAsync(). Catch OSC errors and return actionable messages: 'Failed to send to Sonic Pi on <host>:<port>. Verify Sonic Pi is running and OSC address is correct.'
• Add per-parameter validation and error messages. If code is empty, return 'code parameter cannot be empty.' If sustain or cutoff are negative, return 'sustain and cutoff must be non-negative.'
• Expand queue_segment description to clarify what 'crossfaded handoffs' means and when to prefer queue_segment over play_note (segment-scale vs single-note operations).