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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions the external Open-Meteo dependency but does not state that this is a network query, whether inputs are discarded, whether it is read-only, or what error/rate-limit behavior might occur.

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 sentence with no filler and front-loads the key idea 'latitude and longitude'. It is concise, though slightly too terse for the tool's complexity, so it does not earn a 5.

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 9-parameter tool with no output schema and no annotations, a one-line description leaves too much unstated: which parameter triggers the lookup, what the exact response shape is, and how this tool relates to weather-hint or other sibling tools. The core output is stated, but the definition is not complete enough for reliable invocation.

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 each of the nine parameters is already documented and the baseline is 3. The tool description adds no parameter-level guidance, and it does not clarify whether 'city', 'query', or some other field is the intended place input, which keeps this at baseline rather than higher.

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 conveys that the tool returns latitude and longitude for a place via Open-Meteo, which is a concrete outcome and distinguishes it from timezone/weather tools. It lacks an explicit verb and does not name a sibling tool, so it is clear but not maximally differentiated.

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 weather-hint or other shape/hint tools. The phrase 'for a place' only weakly implies a coordinate-lookup use case, and no exclusions or alternatives are mentioned.

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