Strong schema coverage with 21 well-defined tools using Zod validation. Tool names follow verb_noun pattern (pd_start_demo, pd_open_patch, etc.). Descriptions are present and substantive (avg ~150 chars), explaining WHAT and WHEN. However, parameter descriptions are sparse or missing entirely, most params lack guidance on format, constraints, or dependencies. Output schemas are not documented in the visible code. Error handling is basic (try/catch with message extraction). No tool annotations (readOnlyHint, destructiveHint) despite clear risk classifications in the spec.

• Add parameter descriptions to all tools. For each param, state: what it controls, valid format/range, and any constraints. Example: 'frequency (Hz): oscillator pitch, range 20 - 20000, default 220. Use lower values for bass, higher for treble.'
• Document output schemas for all tools. Create a schema reference showing what fields pd_status, pd_live_graph, pd_preview_patch, and pd_list_audio_devices return. Include example responses.
• Add tool annotations to tool registration. Mark destructive tools with destructiveHint=true (pd_stop, pd_live_remove_object, pd_live_clear), read-only tools with readOnlyHint=true (pd_status, pd_live_graph, pd_preview_patch, pd_list_audio_devices), and idempotent tools with idempotentHint=true where applicable.
• Enhance error messages with recovery guidance. Instead of 'File not found', return 'Patch file not found at /path/to/patch.pd. Verify the path exists and is readable. Use pd_list_audio_devices to check system state, or pd_preview_patch to see the current patch.'
• Add constraint descriptions to parameter docs. For regex patterns (selector, object IDs, connection IDs), explain in plain text: 'selector must start with a letter or underscore, followed by alphanumerics, dots, tildes, or hyphens (e.g., my_control, freq.hz).' For enums, explain when to use each option.