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

No annotations are present, so the description carries the full burden. It mentions Open-Meteo as the backend but does not disclose that most inputs are discarded, that an external lookup occurs, or what the response contains.

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 short and front-loaded with the core output, but it is a noun phrase rather than an actionable instruction. It is concise without being informative enough to stand alone.

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 nine optional parameters, no output schema, and no annotations, this one-line description is inadequate. An agent cannot determine which input to provide, what the tool ignores, or what format the coordinates are returned in.

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 schema documents each parameter. However, the tool description does not explain how 'place' maps to any of the nine parameters; the closest candidate, 'city', is described as being for a 'public weather hint', which creates ambiguity.

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 signals that the tool provides latitude and longitude for a place using Open-Meteo, so the general purpose is inferable. However, it lacks an explicit verb, does not name the relevant input, and does not distinguish itself from siblings like weather-hint or timezone.

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 guidance is provided on when to use this tool or which parameter to populate. With nine optional parameters and no required fields, the description does not indicate that 'city' is the relevant input or that the other parameters are ignored.

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