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

With no annotations, the description must carry the full behavioral burden, but it only mentions the Open-Meteo source and the coordinate output. It does not disclose whether an external network request is made, whether inputs are retained, or what error/rate-limit behavior exists.

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 and front-loads the output type and external service. It is concise, though it leaves out important usage details that are handled in other dimensions.

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 tool has no annotations or output schema, and the input schema has seven optional properties, so a one-line description is insufficient. Missing information includes which parameter supplies the place, output format or precision, failure modes, and whether network access is required.

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 schema descriptions are detailed across all seven parameters, giving a high baseline of 3, but the tool description never connects 'a place' to a concrete parameter. The agent cannot tell whether to pass city, url, host, or another property, and the city parameter is described as being for a weather hint rather than a geo hint.

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, so the core function is identifiable. However, it lacks a verb and does not explicitly differentiate geo-hint from sibling tools like weather-hint that may also operate on place names.

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. The only implied usage context is 'for a place,' but no explicit conditions, exclusions, prerequisites, or sibling comparisons are provided.

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