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 the core behavior: an Open-Meteo lookup producing latitude and longitude. It does not state that the operation is read-only, how unknown places are handled, or the exact return structure, but the core external-call behavior is visible.

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 the key output and source front-loaded. There is no filler or redundant restatement of the tool name.

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, no output schema, and a 9-parameter optional schema. A correct invocation depends on knowing that `city` is the relevant input and what the returned coordinates look like. The description provides neither, so an agent facing many optional fields would struggle to call 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?

All nine parameters have schema descriptions, giving full coverage and a baseline of 3. The description adds no parameter-level guidance and does not connect 'a place' to the `city` parameter, while several schema fields are clearly unrelated to geo-hint, creating mild 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 clearly indicates the tool returns latitude and longitude for a place and names the external source (Open-Meteo), which distinguishes it from weather or timezone siblings. However, it is a noun phrase rather than an explicit action statement and does not name the input parameter that 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 about when to use this tool versus siblings like weather-hint, timezone, or other shape-check tools. The description does not mention expected inputs, exclusions, or alternative tools, leaving selection entirely to inference.

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