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

With no annotations, the description must carry behavioral disclosure; the only trait disclosed is non-retention of identifiers. It does not mention side effects, external calls, or what the classification means, so the agent cannot anticipate the tool's behavior.

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 text is short and contains no filler, but the single sentence is too under-specified for a 9-parameter tool with many siblings. It is concise but not sufficiently informative.

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 no annotations and no output schema, the description should explain the classification result and parameter semantics. It only states that identifiers are not retained, leaving the agent to guess how to invoke the tool 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%, so each parameter already has an individual description and the baseline is 3. The tool description adds no cross-parameter context such as which input is expected or whether parameters are alternatives.

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 verb and object ('Show how this request is classified'), but 'this request' is undefined and the classification scheme/categories are not explained. It is not a tautology, yet it is too vague to distinguish from the many sibling shape/classification 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?

No guidance is given about when to call compatibility instead of domain-shape, validate-json, timezone, or other siblings. The privacy note does not substitute for use-case selection criteria.

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