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

With no annotations, the description carries the full burden of behavioral disclosure. It only says 'via Open-Meteo' and gives no indication of side effects, external API behavior, rate limits, or that inputs are discarded after the call.

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 states the output and the source in the first clause. It earns its place entirely.

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?

With 9 optional parameters, no required parameters, and no output schema, the description is too thin: it does not indicate which parameter supplies the place, what the returned latitude/longitude format looks like, or how failures are reported. An agent would need to inspect the schema and still remain uncertain.

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% and each parameter has a descriptive field, so the baseline is 3. The description's 'place' maps loosely to the city parameter but does not explicitly say to use city, so it adds little meaning beyond the schema.

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 identifies the tool's product—latitude and longitude for a place—and names Open-Meteo as the source, which distinguishes it from siblings like weather-hint or timezone. It lacks an explicit verb such as 'Get' and does not name the expected input parameter, so it stops short of a fully specific instruction.

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 when-to-use guidance and no mention of alternatives or exclusions. An agent must infer that this tool is for geocoding and is not told which sibling tools to prefer instead.

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