spotify-mcp

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It fails to mention authentication requirements, rate limits, URL formats/sizes returned, or error conditions (e.g., private playlists). The only behavioral hint is 'URLs' plural, suggesting multiple image resolutions.

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?

The single sentence is appropriately front-loaded with the action verb and contains no filler. However, extreme brevity comes at the cost of omitting necessary parameter documentation that the schema fails to provide.

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?

While an output schema exists (reducing the need to describe return values), and the operation is simple, the description is incomplete due to total lack of parameter documentation. For a 1-parameter tool with 0% schema coverage, the description should explain the required identifier.

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?

With 0% schema description coverage, the description must compensate but does not. It fails to explain the 'playlist_id' parameter format (Spotify URI vs. ID), where to obtain it, or validation constraints, leaving the parameter completely undocumented beyond the schema title.

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?

The description uses a specific verb ('Get') and resource ('playlist's cover image URLs'), clearly distinguishing this from sibling tools like 'spotify_get_playlist' (general metadata) and 'spotify_get_playlist_tracks' by explicitly targeting cover art retrieval.

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?

The description provides no guidance on when to use this tool versus alternatives like 'spotify_get_playlist' (which may also return cover images as part of general playlist data), nor any prerequisites or conditions for use.

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