get_user_playlists

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full disclosure burden and does meaningful work: results are 'sorted by last updated date (most recent first)', the return type is a dictionary, and the numbered processing steps reveal available fields (title, track count, TIDAL URL, last updated). It omits auth dependency and empty-state behavior, but for a zero-param read-only getter this is solid context beyond the bare call.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Well-structured and front-loaded: purpose sentence first, then triggers, then behavior, then presentation guidance. But it is verbose for a zero-param getter — the trigger list contains near-synonymous entries ('Show me my playlists', 'List my TIDAL playlists', 'What playlists do I have?') and the four numbered presentation steps could be condensed into one or two sentences.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the empty schema, absent annotations, and missing output schema, the description is thorough: it covers when to invoke, sorting behavior, return type, and even which fields to surface when presenting results. It would earn a 5 with an explicit note about requiring a prior TIDAL login or how it behaves when the account has no playlists.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema is an empty object with zero parameters, so the baseline of 4 applies — there is nothing for the description to clarify. The description adds no parameter semantics, but none are needed.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

Opens with a specific verb+resource: 'Fetches the user's playlists from their TIDAL account.' The possessive scope ('the user's') clearly separates it from sibling search_playlists (public search) and get_playlist_tracks (tracks inside a single playlist), so an agent can distinguish it without inspecting schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides an explicit trigger block — 'USE THIS TOOL WHENEVER A USER ASKS FOR' — with concrete example phrasings and a catch-all ('Any request to view or list their TIDAL playlists'). However, it never states when NOT to use it or names the alternative for other playlist requests (e.g., search_playlists for public playlists), so it stops short of the full when/when-not/alternatives bar.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.