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 states that the tool returns latitude and longitude via Open-Meteo, but does not mention side effects, data handling, what parameters are used, or what happens to the many other parameters. The schema descriptions mention discarding values, but those are in the schema, not 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 sentence and technically concise, but it is under-specified rather than efficiently concise. It omits critical information about how the tool works, leaving the agent to infer from the confusing schema. Conciseness is not valuable when it sacrifices necessary 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?

The tool has nine parameters, no output schema, and no annotations. The description provides almost no context about what the tool actually does with these parameters, what inputs are expected, or what the return format is. This is completely inadequate for an agent to use the tool 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 coverage is 100%, so each parameter has a description, but the tool description adds no semantic linkage between the parameters and the stated purpose. The parameters appear to be a grab-bag of unrelated fields (git ref, URL, city, feed, host, JSON, path, zone, query) with no indication of which one selects the 'place' for the coordinate lookup. The description fails to compensate for the schema's ambiguity.

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 a specific output (latitude and longitude) and a data source (Open-Meteo), which gives a clear core purpose. However, it does not explain how the place is specified, and the input schema contains nine unrelated optional parameters (ref, url, city, feed, host, json, path, zone, query) with no clear mapping to the stated purpose. It also fails to differentiate from siblings like weather-hint or timezone.

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?

No guidance is provided on when to use this tool versus alternatives. The description offers no context, prerequisites, or exclusions. An agent has no way to decide between geo-hint and weather-hint or timezone based on the description alone.

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