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

With no annotations provided, the description carries the full burden of explaining behavior. It only states that identifiers are not retained, which hints at privacy but does not explain what processing occurs, what 'classified' means, or whether any side effects exist. The descriptions in the schema mention discarding and checking, but the tool description itself remains opaque.

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 free of fluff, but it is so underspecified that brevity works against clarity. Both sentences are relevant, yet they do not convey enough information to be useful. It is concise but not adequately 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?

There is no output schema, no behavioral details, no usage context, and no explanation of how the nine optional parameters interrelate. Given the complexity of the input and the lack of annotations, the description is far from complete for an agent to invoke the tool correctly and interpret its result.

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?

The input schema has 100% parameter description coverage, so the baseline is 3. However, the tool description adds no parameter-level meaning, and the schema descriptions are generic (e.g., 'Git ref name', 'HTTPS URL to normalize or cite') without explaining how each parameter affects classification. The meaning is not harmful but also not enhanced.

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 and does not specify what classification means, what output is produced, or what categories are used. The tool name 'compatibility' adds little clarity, and the relationship between the many input parameters and the classification result is left entirely implicit.

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 versus any of its many siblings. No alternatives are mentioned, no conditions are given, and the vague purpose makes it impossible for an agent to know which situation this tool is meant for.

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