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

With no annotations and no output schema, the description carries the full burden but only says identifiers are not retained. It does not disclose what output is produced, whether side effects occur, or how input is processed.

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 brief and not wordy, but it is too sparse to be useful. It fits within one sentence, yet that sentence lacks the detail needed to understand the tool.

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 tool has 9 optional parameters, no required fields, and no output schema, but the description does not explain how many parameters to supply, what output to expect, or how 'compatibility' is determined. This makes the tool effectively unusable from the description alone.

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 9 parameters have individual descriptions with examples of expected formats, so schema coverage is complete. However, because the tool's purpose is unclear, the relationship between these parameters and the classification behavior is not explained.

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 never defines what classification means or what resource/action is involved. The generic name 'compatibility' and the lack of a clear object make the purpose ambiguous.

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 for when to use this tool instead of a sibling validator, nor any conditions or alternatives. The description does not mention the other tools or specify input criteria.

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