Sound has 15 well-named tools with consistent verb_noun patterns (search_catalog, get_song_details, play_pause). All tools have descriptions (avg ~80 chars, within baseline 34-392). Input schemas are present with type declarations for all parameters. However, parameter descriptions are minimal (often 1-2 lines), output schemas are not documented, and error handling lacks recovery guidance. No tool annotations (readOnlyHint/destructiveHint) despite clear risk classification. Missing pagination guidance for list tools (get_library_playlists, get_recently_played). Descriptions are functional but could be more LLM-optimized per pattern:tool-description baseline.

• Document output schemas for all tools. Example: get_song_details should return {title: string, artist: string, album: string, duration_ms: number, release_date: string, id: string}. This enables agents to chain calls and extract the right fields.
• Add tool annotations to CallTool registration. Mark read-only tools with readOnlyHint=true (search_catalog, get_*) and destructive tools with destructiveHint=true (play_pause, skip_*, play_song, set_queue, create_playlist, add_to_playlist). This guides LLM safety reasoning.
• Expand parameter descriptions to 50-100 chars with format/constraint hints. E.g., 'Search query (string, 1-200 chars; supports artist, song, or album names)' instead of 'Search query'. Include examples of valid values for enum-like params (type: 'song|album|artist').
• Add pagination support to list tools. get_library_playlists and get_recently_played should return {items: [...], total_count: number, limit: number, offset: number} and accept offset/cursor parameters. Cap results at 25-50 items per call.
• Enhance error messages with recovery hints. Instead of 'Search error: <error>', return 'Search failed: <error>. Verify the query is 1-200 characters and try again, or use a simpler search term.' For 'No song found with ID', suggest 'Try search_catalog() to find the song ID first.'