get_history

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only implies a read operation with a temporal filter ('recent'), but does not disclose side effects, authentication needs, rate limits, or pagination behavior. The single sentence leaves many important behavioral gaps.

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 imperative sentence: 'Get recent play history.' It is concise with no wasted words. While it could benefit from slightly more detail, it is not overly sparse to the point of being cryptic. It earns its place by clearly stating the tool's primary action.

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 that there are no parameters and an output schema exists to describe return values, the description is minimally acceptable. However, it lacks completeness regarding the definition of 'recent', any implicit limits, and how the results are ordered. The agent may still need to infer these details from the output schema, leaving some uncertainty.

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 has 0 parameters and schema_description_coverage is 100% (trivially). According to the rubric, 0 parameters sets a baseline of 4. The description cannot add parameter meaning beyond the schema, but it does not need to because there are none. This score is appropriate.

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 verb 'Get' and the resource 'recent play history'. It distinguishes the tool from siblings like search_music and get_playlists, as none of them deal with history. However, the description could be more specific about the type of history (e.g., playback, search) and the scope of 'recent'.

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 vs its siblings. There is no mention of use cases, exclusions, or alternatives. The agent receives no contextual hints about selecting this tool over other retrieval or search tools.

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