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

Annotations declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds nothing beyond that – no note on what the lookup returns, no fallback behavior when an id is invalid, no rate/permission context.

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?

It is short, but shortness here reflects under-specification rather than efficiency. The single fragment omits context an agent needs and does not front-load any actionable information.

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?

For a 2-param lookup tool with an output schema and annotations, the description still fails to say that exactly one of id/uri is required or when this detail endpoint should be chosen over sibling track endpoints. It is incomplete given the density of sibling tools.

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?

Schema description coverage is 100% and both parameters (id, uri) are documented in the schema, including the omission relationship between them. The description adds no parameter meaning, so the baseline of 3 applies.

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 'Spotify track details' essentially restates the tool name spotify_track without adding a verb or scope. It implies retrieval of a track's metadata but does not clarify how it differs from spotify_tracks_search, spotify_track_recommended, or spotify_track_similar_albums.

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?

No guidance on when to use this tool versus the many sibling track tools (track_recommended, track_similar_albums, tracks_search). No mention of the id/uri prerequisite relationship, and no exclusion conditions are given.

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