music_get_playlist

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

Annotations already provide readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is clear. The description adds minimal behavioral context, only indicating that it returns a single playlist. It doesn't mention error cases or edge conditions, but the annotations carry most of the burden and there's no contradiction.

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 description is a single concise sentence that front-loads the action, resource, and key parameter. Every word adds value, with no redundancy or filler.

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 tool's simplicity (one required parameter, no nested objects) and the presence of an output schema and clear annotations, the description is largely sufficient. It could improve by noting the outcome when the ID doesn't exist, but the core functionality is covered.

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 schema only defines playlist_id with no description, and schema coverage is 0%. The description adds the modifier 'persistent ID,' which implies the ID is a stable identifier, but doesn't explain how it relates to other tools or how to obtain it. This is some added meaning but not comprehensive.

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 clearly states the action ('Get') and resource ('playlist'), and the qualifier 'by persistent ID' specifies the exact retrieval method. This distinguishes it from sibling tools like music_list_playlists, which lists playlists, and music_list_playlist_tracks, which retrieves tracks within a playlist.

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 gives no explicit guidance on when to use this tool versus alternatives. It doesn't mention that you need a persistent ID, how to obtain it, or when to prefer this over listing or searching playlists. The usage context is only implied by the description itself.

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