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

No annotations are provided, so the description bears full responsibility for disclosing behavioral traits. It does not state whether the tool makes a network call, what happens if the city is invalid or missing, or any side effects. The single sentence gives no behavioral context beyond the implicit 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 sentence with no redundancy, which is concise. However, it is under-specified and lacks essential details, so it is not appropriately sized for the tool's complexity. It is minimal but not effectively front-loaded with the most critical information.

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 parameters, none required, and no output schema, the description fails to specify which parameters are needed, what the output looks like, or any constraints. An agent cannot reliably invoke this tool correctly without additional inference.

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?

While schema description coverage is 100%, the parameter descriptions are generic and not tailored to this tool (e.g., 'Git ref name', 'HTTPS URL', etc.). The description adds no clarification that only 'city' matters, so an agent might mistakenly pass irrelevant parameters. The high coverage does not compensate for the lack of tool-specific parameter meaning.

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's function: retrieving the current temperature for a city via Open-Meteo. It uses a specific verb and resource, making the core purpose unambiguous. However, it does not explicitly differentiate from sibling tools like geo-hint or timezone, though the weather domain is distinct enough.

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 offers no guidance on when to use this tool versus alternatives, nor does it mention any prerequisites or required parameters. An agent has no indication that the 'city' parameter is the key input or that other parameters are irrelevant.

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