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

No annotations are provided, so the description carries the full behavioral burden. It discloses only that Open-Meteo is used, but does not mention that most parameters are discarded, whether a network call is made, or what the returned value looks like. The schema hints at discard behavior, but the description itself adds almost 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 short sentence with no filler or redundancy. It is easy to scan and front-loads the core idea. However, its brevity comes at the cost of needed operational detail.

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 nine optional parameters, no output schema, and no annotations, this one-sentence description is inadequate for correct invocation. An agent cannot determine which parameter to populate, what the response will contain, or how this tool fits into a workflow. It provides only a vague hint rather than a complete contract.

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 is already documented in the input schema. The description does not add any parameter-level meaning, such as which parameter represents the 'place' or how the latitude/longitude result is produced. A baseline of 3 is appropriate because the schema carries the weight.

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 does state a specific outcome — latitude and longitude for a place — and names the external source Open-Meteo. However, it lacks an explicit verb and does not connect this purpose to any of the nine input parameters. It also does not differentiate from the sibling weather-hint tool, which may use the same city concept.

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 geo-hint versus weather-hint, timezone, or other sibling tools. No exclusions, prerequisites, or alternative routing are provided. With 28 sibling tools, the description leaves the agent to guess based on the tool name alone.

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