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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It does reveal that the expression is discarded, but it does not explain what is actually evaluated, what the return value looks like, or whether any side effects occur.

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 two short sentences with no filler, and the core action is stated first. It is compact and every sentence carries content, even though the brevity contributes to the lack of useful guidance.

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 9 optional parameters, no output schema, no annotations, and 27 sibling tools, the description does not say what the tool returns or how it differs from the many sibling check tools. It is far too sparse to let an agent call this tool with confidence.

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% description coverage and each parameter is individually explained, such as url being normalized or cited and json being validated, so the high-coverage baseline applies. However, the tool description itself adds no connection between these parameters and 'a+b style arithmetic,' leaving the relationship unclear.

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 names a specific action and resource ('Evaluate a+b style arithmetic'), but the meaning is undercut by 'Expression discarded' and there is no arithmetic expression parameter anywhere in the input schema. The tool is not a pure tautology, but it is misleading about what it actually accepts and does.

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 when-to-use or when-not-to-use guidance is provided, and no alternatives or prerequisites are mentioned. The only usage signal is the terse arithmetic claim, which is contradicted by the 'discarded' note and the unrelated schema fields.

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