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

The description and parameter notes claim that identifiers are not retained and values are discarded after checks, which provides some transparency about side effects. However, there is no statement about read-only behavior, potential external calls, or what the tool does with the input besides 'classifying' it.

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 short and front-loaded, with no unnecessary words. The one-sentence purpose plus a privacy note is appropriately sized for a tool of this apparent simplicity.

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?

With no output schema, no examples, and no explanation of what 'classified' means, the description leaves too much ambiguity. An agent cannot predict the return format, the classification categories, or how to interpret the result, making the tool contextually incomplete.

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?

Each parameter has a description that adds semantic context beyond the bare string type, such as 'Git ref name', 'City name for a public weather hint', and 'IANA timezone name'. These descriptions help clarify the intended role of each field, though some terms like 'shape check' remain undefined.

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: it does not specify what kind of request, what classification means, or what output is produced. The tool name 'compatibility' hints at a purpose but does not make it clear enough to distinguish from sibling tools.

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 given about when to use this tool versus alternatives. There is no mention of suitable scenarios, examples, or relationships to sibling tools, so an agent has no basis for selecting it over similar utilities.

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