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

The description says the expression is discarded but no expression parameter exists, making the note confusing. No side effects, permissions, or other behavioral details are disclosed, and no annotations are present to fill the gap.

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 very short and front-loaded, but it omits essential information and is inconsistent with the schema. Conciseness is achieved at the expense of clarity and utility.

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 is not complete for its stated purpose: there is no way to supply an arithmetic expression, no output schema, and no clarification of how the unrelated parameters relate to evaluation. A caller cannot reliably infer how to invoke this tool correctly.

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?

Although every parameter has a schema description, the descriptions are unrelated to arithmetic evaluation (e.g., Git ref, URL, city name). The critical expression parameter is missing entirely, so the schema adds no meaningful guidance for the stated purpose.

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 it evaluates a+b style arithmetic, but the schema has no expression parameter and instead lists nine unrelated parameters. This makes the tool's actual purpose ambiguous and potentially misleading.

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 about when to use this tool versus any alternatives. Sibling tools are not referenced, and no conditions or recommended contexts are given.

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