Server has 4 tools with basic descriptions and some parameter documentation, but significant gaps in schema completeness, error handling guidance, and composition. Tool names follow verb_noun convention (good), but descriptions lack LLM-optimized structure. Parameters have types but many lack constraints. No output schemas documented. Error responses are generic ('Unknown error') rather than actionable. Descriptions range 50-400 chars (within baseline 34-392), but lack WHEN/WHY guidance. No tool annotations (readOnlyHint/destructiveHint). Overall structure is functional but below production quality.

• Document output schemas for all tools. Example for get_favorite_tracks: 'Returns {status: string, tracks: [{id: string, title: string, artist: string, album: string, duration: int, url: string}], total_count: int}'. This enables LLMs to chain calls and extract IDs for downstream tools.
• Enhance error responses with recovery paths. Replace 'Failed to connect to TIDAL authentication service: {error}' with 'Authentication service unavailable. Retry in 30 seconds, or check your internet connection. If persistent, contact TIDAL support.'
• Add parameter constraints to recommend_tracks. Specify: limit_per_track (1-100, default 20), limit_from_favorite (1-100, default 20), track_ids (optional array of 1-50 TIDAL track IDs). Document mutual exclusivity: 'If track_ids is empty, will use user favorites.'
• Add tool annotations via FastMCP. Mark tidal_login and create_playlist with destructiveHint=true; mark get_favorite_tracks and recommend_tracks with readOnlyHint=true. This signals to agents which tools have side effects.
• Expand create_playlist description to 100-150 chars. State: 'Creates a new TIDAL playlist with the given title and adds specified tracks. This is a write operation; verify track IDs before calling. Returns playlist_id and playlist_url for sharing.'