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

No annotations are provided, so the description must carry the full behavioral burden. It only states the action without disclosing that it makes a network call, that other parameters are discarded, that results are ephemeral, or any failure modes. The description adds minimal behavioral context beyond the bare action.

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 a single, front-loaded sentence with no wasted words. It is appropriately concise, though it sacrifices necessary detail. Structurally it is easy to parse, but the brevity comes at the cost of completeness.

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?

Given the tool has 9 optional parameters, no output schema, and no annotations, the description is severely incomplete. It does not explain which parameters are actually used, how to construct a valid call, or what the response will look like. The context is far too sparse for an agent to use the 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?

The schema has 100% description coverage, but most parameter descriptions are irrelevant to the tool's purpose (e.g., 'Git ref name', 'HTTPS URL', 'JSON text'). The tool description does not clarify that only 'city' matters, nor does it explain how to use the parameters. This is a case where the schema is misleading and the description fails to compensate, so a score below baseline is warranted.

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 clearly states the verb (get current temperature) and resource (a city via Open-Meteo). It is specific enough to convey the core function, though it does not differentiate from sibling tools like 'geo-hint' or 'timezone' that might also involve location or weather-adjacent data. The description is not a tautology but could be more explicit that only the 'city' parameter is relevant.

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. No mention of prerequisites, such as needing a valid city name, or exclusions like 'not for weather forecasts.' The agent is left to infer usage from the description alone, which is insufficient.

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