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

The privacy note "No identifiers are retained" is a useful behavioral disclosure. However, the description does not state side effects, whether inputs are stored, or what happens during classification, and there are no annotations to supplement this.

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 redundant wording. The two sentences are short and each adds some information, though the first is too vague to be fully effective.

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?

The description lacks essential context such as what the output looks like, what classification categories exist, and how the four optional parameters are used together. For a multi-parameter tool, this is not complete enough for an agent to invoke it confidently.

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?

All four parameters have descriptions, but they are terse and disconnected from the tool's vague classification purpose. The descriptions do not explain whether parameters are required, how they combine, or what each contributes to the result.

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 only "Show how this request is classified," which is vague and does not define what "classified" means. The tool name and unrelated parameters (url, host, json, zone) do not clarify the actual purpose or result.

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 rather than the many siblings like normalize-url, validate-json, timezone, or domain-shape. The description does not mention selection criteria or alternatives.

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