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

With no annotations, the description must disclose behavioral traits. It only mentions reliance on Open-Meteo, implying an external call, but does not address side effects, rate limits, parameter discard behavior, or output format. This is insufficient for a tool with no annotation safety profile.

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 that front-loads the core purpose. However, it is so brief that it omits essential details, making it more under-specified than properly concise.

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?

For a tool with 9 parameters and no output schema, the description is highly incomplete. It does not explain how to supply the place, what the returned coordinates look like, or how to interpret the many parameters. An agent cannot reliably invoke it correctly based on this description alone.

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?

Schema coverage is 100%, so the baseline is 3. The description adds no meaning beyond the schema's own parameter descriptions, and it fails to clarify which of the 9 parameters is the 'place' input. It does not harm, but it also does not enhance parameter understanding.

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 a clear function: returning latitude and longitude for a place via Open-Meteo. It names a specific verb and resource, but it does not specify which input parameter identifies the place, given the schema contains many unrelated fields (e.g., ref, url, json, path). This ambiguity prevents a perfect score.

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 provides no guidance on when to use this tool versus alternatives like weather-hint or timezone. It does not mention prerequisites, exclusions, or which sibling tools to prefer in specific contexts.

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