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

With no annotations, the description carries the full burden of behavioral disclosure. It only states 'No identifiers are retained', which is a privacy note, but does not explain whether the tool performs network calls, modifies state, or what 'classification' entails. The schema hints at checks ('discarded after the shape check') but the description does not synthesize this into clear behavioral expectations.

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 two sentences and concise, but it is under-specified. It does not front-load actionable information; the privacy note is the only concrete detail. The brevity does not compensate for the lack of content – it is not efficiently informative but simply short.

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 complex tool with 9 optional parameters and many sibling tools, but the description gives no indication of what the tool returns, how it classifies, or when it should be used. There is no output schema, so the description should explain the output format or behavior, but it does not. It is grossly incomplete for an agent to call 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%, so the baseline is 3. The description adds no extra meaning about the parameters; it does not explain how they relate or what 'classification' means in terms of them. It neither improves nor degrades the schema's already detailed per-parameter descriptions.

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 'Show how this request is classified' but does not specify what classification means, what categories exist, or what the tool actually does. It is not a tautology, but it is vague and does not distinguish from siblings like domain-shape or browser-url-ok, which have specific purposes.

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?

The description provides no guidance on when to use this tool versus alternatives. No sibling tools are mentioned, no conditions are given, and there is no exclusion criteria. An agent has no way to know if this tool is appropriate for a given request.

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