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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only mentions Open-Meteo, implying an external lookup, but does not describe return format, failure behavior, network dependency, or that many schema fields are discarded. The schema's 'discarded after...' notes are not reflected in the description.

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 concise sentence with no filler, which is efficient. However, for a complex tool with 9 optional parameters, no annotations, and no output schema, it is too minimal to be considered well-structured; the brevity comes at the cost of crucial context.

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?

Given the tool's complexity, one sentence is inadequate. The description does not explain which parameter represents the place, what the returned coordinates look like, how failures are handled, or how this tool relates to the many sibling hint/check tools. The agent would struggle 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?

The input schema already documents all 9 parameters with 100% coverage, so the description is not required to restate them. It adds the geocoding intent (place -> coordinates via Open-Meteo), but it does not map the description to a specific parameter such as 'city' or reconcile the unrelated-looking schema fields.

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 identifies the core purpose: returning latitude and longitude for a place via Open-Meteo. It is not a tautology and informs the agent what kind of result to expect, though it does not explicitly distinguish geo-hint from related sibling tools like weather-hint.

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?

The description gives no guidance about when to use this tool versus alternatives, nor does it mention conditions, exclusions, or prerequisites. An agent is left to infer that a 'place' must be supplied, but the schema has 9 optional parameters and no indication of which one is the place.

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