Discogs: get marketplace stats for a release

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

The readOnlyHint annotation already declares the tool is read-only, and the description adds the specific outputs (quantity and price). However, it does not disclose potential behavioral nuances, such as the role of the currency parameter or whether the price is returned in the requested currency, which would be valuable context for the agent.

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 purpose and specifies the exact data returned. No unnecessary words or redundant information—every word earns its place.

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?

The tool is simple and the description covers the core outputs, but the lack of an output schema and unclear parameter semantics (especially currency) leave gaps. The agent doesn't know the response format or how the currency parameter affects the result, so the description is not fully complete for a tool without an output schema.

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%, so the description must compensate. It implies that release_id identifies the release ('for a release'), but it does not explain the 'currency' parameter at all, leaving its purpose and allowed values (beyond the length constraint) undocumented. This is a significant gap for a low-coverage schema.

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 tool's function: getting the number of copies for sale and the lowest current price for a release. It uses a specific verb ('Get') and resource ('marketplace stats for a release'), and explicitly lists the two data points, distinguishing it from sibling tools like price suggestions or release details.

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 is provided on when to use this tool versus alternatives such as discogs_get_price_suggestions or discogs_get_release. The description does not mention alternative tools, prerequisites, or typical scenarios, leaving the agent to infer usage from the name and description.

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