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

There are no annotations, so the description carries the full burden of behavioral disclosure. It only reveals that the lookup happens via Open-Meteo; it does not mention network dependency, error behavior, side effects, or that most input fields are discarded.

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 filler and every word contributes. It loses a point because it is a noun phrase rather than an explicit instruction, leaving the verb 'returns' implicit.

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 no annotations, no output schema, and nine parameters, the one-sentence description is insufficient. It does not explain which parameter identifies the place, what the output format is, what happens on failure, or how this tool relates to the many sibling tools.

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 description coverage is 100%, so the baseline is 3 even without parameter details in the tool description. The description adds little beyond 'a place,' and the agent must infer that city is the relevant parameter while the other eight optional fields are unrelated to the coordinate lookup.

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: return latitude and longitude for a place, with Open-Meteo as the provider. It is specific enough to distinguish this from sibling tools like weather-hint or timezone, though it lacks an explicit verb and does not name alternatives.

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?

No usage guidance is provided. The description does not say when to prefer geo-hint over other tools, what kind of place input is expected, or whether only the city parameter is relevant. The intended usage is only implied by the purpose statement.

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