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

With no annotations, the description must carry the behavioral disclosure burden, but it only mentions the data source. It does not disclose that the tool likely performs an external network call, that non-relevant parameters are discarded, or what happens on invalid input.

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 wasted words, which is efficient. However, it is under-specified given the tool's nine-parameter schema and lack of output schema, making the brevity feel more like omission than intentional conciseness.

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?

The description does not explain how to select the correct parameter, what the output looks like beyond 'latitude and longitude', or any error/edge-case behavior. Given the high parameter count and no output schema, the tool definition leaves significant gaps for an agent trying to invoke it correctly.

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 baseline is 3. The description adds little beyond the schema; it does not explicitly connect 'a place' to the city parameter among the nine listed parameters, leaving the agent to determine which parameter is actually used for geocoding.

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 that the tool returns latitude and longitude for a place using Open-Meteo, which is a clear resource and source. However, it lacks an explicit verb and does not differentiate the tool from siblings like weather-hint that might also involve place-based data.

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 versus alternatives such as weather-hint or timezone. No prerequisites, exclusions, or selection criteria are provided, so the agent is left to infer usage entirely from the name and schema.

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