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

With no annotations provided, the description carries the full burden of disclosing behavior. It only states what the tool returns ('latitude and longitude'), but does not explain side effects (e.g., network calls to Open-Meteo), whether any parameters are ignored or discarded, or what happens when multiple parameters are supplied. The parameter descriptions in the schema mention discarding, but the tool description itself adds no behavioral context.

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 that gets straight to the point. It is efficient and free of fluff, earning high marks for conciseness. However, it is so minimal that it lacks explanatory depth, which slightly detracts from structure but overall still reads cleanly.

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 description is drastically under-specified. It does not explain how the parameters combine, which ones are required for a successful call, what the response format is, or how it relates to sibling tools. The agent would have to guess or rely entirely on the schema, which is not sufficient for correct 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 parameter already has a clear description. The tool description does not add any meaning beyond the schema—it does not explain how parameters like 'city' or 'query' map to the place being geocoded. The baseline of 3 applies because the schema is well-documented, but the description fails to synergize with it.

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 goal—returning latitude and longitude for a place via Open-Meteo—but it does not specify which of the nine parameters identifies the place. It is distinct from siblings like weather-hint in that it returns coordinates, but the link between the described purpose and the actual parameters is missing.

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 such as weather-hint or timezone. The description does not mention any context, prerequisites, or exclusions, leaving the agent to infer proper usage from the parameter schema alone, which is ambiguous.

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