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

No annotations are provided, so the description carries the full burden. 'Query discarded' is a useful privacy/retention disclosure and indicates no lasting side effects, but the description does not explain what the tool returns, how characters are counted, or any other behavioral constraints.

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?

Two short sentences with no filler; the core function and the disposal behavior are front-loaded. It is appropriately concise for a simple tool, though adding the target parameter name would make it more useful without hurt.

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 is too sparse given the broad, weakly related schema and the absence of annotations or an output schema. An agent needs to know which parameter to populate, what the return value looks like, and any character-counting conventions; none of that is provided.

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 12 properties but no 'query' property, and the description never maps 'search query' to a specific parameter. The schema's own description for 'text' does say 'Text to count characters in', which aligns, but the lack of an explicit mapping in the tool description creates real invocation ambiguity, lowering the baseline.

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 states a concrete operation—count characters in a search query—and the disposal note helps set it apart from sibling tools that normalize, validate, or fetch. It is clear enough, but it relies partly on the tool name and does not explicitly contrast with related 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?

There is no guidance on when to use this tool versus alternatives, nor any mention of prerequisites or exclusions. The only implicit context is that it is for counting characters in a search query, which is not enough to route an agent confidently among many similarly named sibling tools.

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