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

With no annotations, the description carries the full behavioral burden. It does disclose a meaningful behavioral trait: 'No identifiers are retained,' reinforced by schema notes that several inputs are discarded. However, it does not explain what the classification operation does with inputs beyond discarding them, whether it involves external calls, or what the response contains.

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 very short, front-loads the main action in the first sentence, and the second sentence adds a distinct privacy guarantee. Every word earns its place, though it is terse to the point of being under-explanatory.

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?

This is a 9-parameter tool with no annotations and no output schema, yet the description gives no sense of how the parameters combine, what classification means, or what result shape to expect. The schema descriptions help, but the overall definition is incomplete for an agent deciding whether and how to invoke it correctly.

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 each parameter's purpose is documented directly in the input schema (e.g., 'discarded after the shape check', 'normalize or cite', 'discarded after the length check'). The description adds no parameter-level meaning, but per the baseline for high schema coverage, 3 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 states a specific action ('Show how this request is classified') and a conceptual resource ('this request'), which is clearer than a tautology. However, it never defines what classification categories or outputs are involved, and it does not distinguish itself from sibling tools like domain-shape, fetch-status, or geo-hint that could all plausibly classify aspects of a request.

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 usage context is provided. The description does not say when to choose 'compatibility' over any sibling tool, nor does it mention any prerequisites, exclusions, or alternative tools. The privacy note is useful but does not guide invocation timing.

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