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

The only behavioral disclosure is 'No identifiers are retained'; some parameter descriptions mention 'discarded' or 'no disk access', but the tool description does not state whether the tool performs network calls, has side effects, or is read-only. Without annotations, this is insufficient transparency.

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 short and front-loaded, with no irrelevant filler. It loses points only because the brevity works against clarity, not because of excess text or poor organization.

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?

With nine optional parameters and no output schema, the description is far from complete: it does not explain what classification result is returned, how to select parameters, or what makes a request 'compatible.' An agent would likely need to guess or call a different tool to understand this one.

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 coverage is 100% and each parameter has a short inline description, so an agent can guess the literal meaning of ref, url, city, etc. However, the tool description adds no higher-level explanation of how these parameters relate to 'compatibility' or classification, so the semantics remain fragmented.

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 says the tool 'shows how this request is classified,' but it never specifies what kind of request or what classification system is used. The tool name 'compatibility' hints at a matching/checking role, but the purpose remains vague and does not clearly distinguish this tool from the many sibling shape/check tools.

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 guidance on when to use this tool instead of a sibling, which parameter to provide, or whether the nine optional parameters are alternatives or meant to be combined. No alternative tools or selection criteria are mentioned.

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