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

No annotations are present, so the description carries the full behavioral burden. It discloses that the lookup happens via Open-Meteo, but it does not state that this is a read-only operation, what happens when irrelevant parameters are passed, whether network access is required, or how errors are reported.

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 to the basic purpose. However, the brevity borders on under-specification for a tool with many optional parameters and no output schema.

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 annotations, and no output schema, a one-line description is not enough. The agent is left without critical context: which parameter is necessary, what the response shape looks like, and what happens if multiple or no parameters are supplied.

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 every parameter already has its own explanation. The tool description adds little parameter-level value, though 'for a place' weakly suggests the city parameter. This is a baseline-3 case: the schema handles the parameter documentation, but the description does not clearly map the intended parameter.

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 names the output ('latitude and longitude'), the resource ('a place'), and the data source ('Open-Meteo'), which makes the tool's basic purpose clear and distinguishes it from a sibling like weather-hint. It lacks an explicit verb such as 'resolve' or 'return', but the intended meaning is still readable.

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 about when to use this tool instead of alternatives, nor which of the nine optional parameters should be provided. The description only implies that a place is involved, leaving the agent to guess that 'city' is the relevant input.

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