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

The description discloses that no identifiers are retained, a useful privacy behavior. However, with no annotations, it does not clarify whether this is a read-only classification, how inputs are processed, or what the response looks like. The schema's 'discarded' notes are not part of the description.

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 redundant prose; the privacy note earns its place. It is slightly under-sized for a 9-parameter tool, but each sentence carries weight, so it remains structured and efficient.

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?

For a tool with 9 optional parameters, no output schema, and no annotations, this description is inadequate. It does not explain the classification output, the relationship among parameters, or how the tool relates to sibling tools, leaving an agent with only disjointed schema notes.

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 baseline of 3 applies. The description adds no parameter-level meaning, but the schema already documents each parameter's purpose and discard behavior, so no extra compensation is needed.

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') but does not define what 'classified' means or what the output categories are. It is not a tautology, but it is too vague to distinguish this tool from sibling shape-check tools like domain-shape or validate-json.

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 about when to use this tool versus sibling alternatives. The description does not mention exclusions, conditions, or alternative tools, leaving an agent to guess whether compatibility is a dispatcher or a check.

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