Tool definitions are present with schemas and basic descriptions, but fall short of production quality. All 14 tools have input schemas and descriptions, but descriptions are generic (avg ~40 chars, well below the 194-char baseline for A+ tools). Parameter descriptions are minimal or absent. No output schemas documented. No error handling guidance. No tool annotations (readOnlyHint/destructiveHint). Missing parameter constraints (enums, ranges, formats). The server exposes Spotify API complexity directly rather than abstracting it into chat-friendly interfaces.

• Expand all tool descriptions to 100-200 characters. Include WHAT the tool does, WHEN to use it (vs similar tools), and what it returns. Example: 'Get the currently playing track on the user's active device. Returns track name, artist, URI, and progress. Use this to check what's playing before pausing or skipping.'
• Add output schemas for all tools. Document the structure of responses (e.g., spotify_search returns {tracks: [{id, name, artist, uri, duration_ms}], total: number}). This enables agents to extract and chain data correctly.
• Convert free-form string parameters to enums where applicable. spotify_repeat state should be enum: ['track', 'context', 'off']. spotify_search type should be enum: ['track', 'album', 'artist', 'playlist']. Add min/max to numeric params (volume: 0-100, limit: 1-50).
• Add tool annotations to all tool definitions. Mark read-only tools (spotify_now_playing, spotify_search, spotify_devices, spotify_playlists, spotify_get_queue) with readOnlyHint: true. Mark destructive/state-changing tools (spotify_play, spotify_pause, spotify_next, spotify_previous, spotify_queue, spotify_volume, spotify_shuffle, spotify_repeat, spotify_transfer) with destructiveHint: true.
• Add parameter descriptions for all parameters. Currently, many params lack descriptions (e.g., spotify_play's 'uri' and 'context_uri' are described but not distinguished; spotify_volume's 'volume' lacks range guidance). Every parameter needs a description explaining its purpose, format, and constraints.