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

With no annotations present, the description carries the full transparency burden. It clearly indicates an external Open-Meteo lookup and the output type (latitude/longitude), but it does not disclose network behavior, possible failure modes, rate limits, or that inputs are discarded after the call.

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 efficient sentence with no filler. It front-loads the core purpose, but it is so brief that it leaves important operational details unstated.

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?

Despite a 100% schema-description coverage, the overall tool context is incomplete: no required-fields are declared, the output schema is absent, and the description does not explain which input corresponds to the place. An agent would struggle to reliably choose the correct parameter, especially with many seemingly unrelated properties present.

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 descriptions cover 100% of the parameters, so the baseline is 3. The tool description adds the geocoding context but does not clarify which parameter is the 'place' or how the many unrelated fields (ref, url, json, path) relate to the geo-hint behavior.

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 via Open-Meteo, which names both the resource (coordinates) and the data source. It is distinguishable from siblings like weather-hint and timezone, though it lacks an explicit verb and does not identify which input parameter represents the place.

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 instead of alternatives such as weather-hint, timezone, or web-fetch. The statement implies coordinate lookup, but it does not state prerequisites, parameter choice, or when not to use it.

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