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

The description implies an external network call to Open-Meteo but does not disclose side effects, failure modes, rate limits, or whether any data is stored. With no annotations provided, the description carries the full burden of behavioral transparency, and it only minimally addresses that.

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, concise sentence with no redundant wording. It is front-loaded with the most important information: what the tool does and through which service.

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 nine optional parameters and no output schema, the one-sentence description is insufficient context. It does not specify which parameters are required, what the response format is, or how errors are handled, leaving significant ambiguity for an agent.

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 the schema has 100% parameter description coverage, the tool description does not clarify which of the nine optional parameters are relevant to the weather lookup. Several parameters like ref, url, feed, host, json, path, zone, and query appear unrelated to the stated purpose, and the description does not disambiguate them.

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 tool returns the current temperature for a city via Open-Meteo, so the core purpose is identifiable. However, it uses a noun phrase rather than an explicit verb like 'gets' or 'returns', which slightly reduces clarity.

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?

The description gives no guidance on when to use this tool versus alternatives, and no conditions or exclusions are mentioned. There is no explicit context for when an agent should select this tool.

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