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

With no annotations, the description carries the full burden of disclosing behavior. It mentions Open-Meteo as an external source but does not clarify that most of the nine input parameters appear to be discarded after shape checks, nor does it describe output format, side effects, or failure modes.

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 short, front-loaded phrase with no wasted words. It is concise, though the lack of a verb and the omission of any operational detail make it feel more like a fragment than a complete tool guide.

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 annotations, and no output schema, this description is incomplete. An agent cannot determine which parameter to pass or what response to expect, and the relationship between the description and the schema's 'discarded' semantics is not explained.

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 little beyond the schema: 'a place' is vague against the nine optional parameters, and no parameter is mapped to that concept. The parameter descriptions themselves are informative, but the tool description does not build on them.

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 communicates the tool's output—latitude and longitude—and its source, Open-Meteo. It is not a tautology and gives a recognizable purpose, though it lacks an explicit verb and does not distinguish itself from siblings like weather-hint.

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 guidance on when to use this tool versus alternatives, what inputs are appropriate, or what prerequisites exist. The description offers only a bare purpose statement.

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