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

No annotations are present, so the description carries the full burden of behavioral disclosure. It reveals an Open-Meteo dependency but does not state the output format, failure behavior, rate limits, or whether the lookup is side-effect free. Several parameters are described as 'discarded,' which suggests unusual behavior that the description does not explain.

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 single sentence is free of filler and front-loads the useful output information. However, it is more under-specified than economically structured: it omits essential invocation details while being very short.

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 optional parameters, no output schema, and no annotations, a one-line purpose statement is insufficient. The agent cannot determine which parameter to pass for the place, what the returned coordinates look like, or what happens when multiple parameters are provided.

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?

All 9 parameters already have descriptions in the schema, so the baseline is 3. The tool description adds the concept of 'a place' but does not map that concept to the 'city' parameter or clarify whether other parameters can also supply the place. Thus, it adds little 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 states the output (latitude and longitude) and the data source (Open-Meteo), so an agent can infer this is a coordinate-lookup tool. However, it is phrased as a noun phrase rather than an explicit verb-plus-resource instruction, and it never connects 'a place' to any of the 9 input parameters.

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 when-to-use guidance, no alternative-tool comparisons, and no exclusions. It does not mention whether 'city' is the expected parameter or whether other parameters like 'url', 'query', or 'host' are alternative place inputs. An agent has to guess when this tool is appropriate versus siblings like weather-hint or lib-docs-hint.

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