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

With no annotations, the description carries the behavioral burden. It does disclose that 'No identifiers are retained' and the parameter descriptions mention data being discarded (e.g., 'discarded after the shape check'), which is useful privacy context. However, it does not state whether the tool is read-only, makes network calls, or what the classification output contains. This is partial transparency.

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 extremely concise: two short sentences with no filler. The purpose statement is front-loaded, and the privacy note is a single extra sentence. Every word earns its place.

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 parameters, no output schema, and no annotations, this description is insufficiently complete. It does not explain what 'classified' means, what output format is expected, or how the parameters relate to each other. The parameter schema helps, but the tool-level context is missing, leaving an agent uncertain about the tool's actual function and return value.

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 all 9 parameters have individual descriptions with behavioral notes (e.g., 'discarded after the check'). The tool description itself adds no parameter-specific meaning beyond what the schema already provides, so the baseline of 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?

The description 'Show how this request is classified' is vague about the exact classification type and resource. It does not state what 'compatibility' means or what classification categories exist, and it does not differentiate from the many sibling tools that perform specific checks (e.g., browser-url-ok, fetch-status). The purpose is not a clear verb+resource pairing.

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 on when to use this tool versus its siblings. The description does not mention alternatives, conditions, or exclusions. An agent has no way to know if this is a generic classifier or when to prefer it over the specific shape/status tools.

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