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

Because no annotations are provided, the description carries the full burden. It does disclose a meaningful data-handling behavior ('No identifiers are retained'), which is useful, and the schema reinforces per-parameter discarding. However, it omits other behavioral context such as whether the operation is read-only, whether external requests are made, or what the classification result 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 concise and front-loaded, with no filler: the main action comes first and the privacy guarantee second. However, the brevity contributes to the vagueness, so it is not a perfect score.

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, no output schema, no annotations, and many sibling classification/shape tools, the description is insufficient. It does not state how the classification is represented, which parameter to use, or how compatibility is determined.

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%, so the schema already documents all nine parameters. The tool description adds no parameter-level meaning beyond what the schema provides, so the baseline 3 applies.

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?

States a verb and a classification task, but 'Show how this request is classified' is vague: it does not explain what classification means, what compatibility refers to, or what output the agent should expect. It also does not distinguish the tool from sibling shape/check tools like domain-shape, validate-json, or file-path-ok.

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 versus any sibling. It gives no conditions, prerequisites, exclusions, or references to alternatives. The privacy note does not explain when the tool should be selected.

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