get_recently_played

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

With no annotations, the description carries more responsibility. It does disclose the read-only nature through 'Get' and adds a useful response-shape detail with 'each item wraps a track key.' However, it says nothing about authentication, pagination, rate limits, or error behavior, so the behavioral disclosure is only partial.

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 front-loaded sentence that states the verb and resource immediately. The parenthetical about the 'track' key is brief and adds meaningful return-shape information without padding.

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 simple tool with one optional parameter and an output schema, the description is nearly sufficient. However, it lacks usage guidance against similar siblings and provides minimal parameter context, while the absence of annotations leaves some safety/behavioral expectations unstated.

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 0% and the description never mentions the limit parameter. The parameter name 'limit' and default 50 give a reasonable hint, but the description adds no semantic value beyond the schema, so it fails to compensate for missing parameter documentation.

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 identifies the resource and action: 'Get the user's recently played tracks.' The phrase 'recently played' distinguishes this from sibling tools like get_saved_tracks and get_playlist_tracks, so an agent can tell them apart without ambiguity.

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?

There is no explicit guidance about when to use this tool versus alternatives such as get_saved_tracks or get_playlist_tracks. The description implies the use case by naming 'recently played,' but it never states exclusions, prerequisites, or why an agent should choose this over a sibling.

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