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

With no annotations, the description carries the full disclosure burden, but it only reveals that the tool uses Open-Meteo. It does not mention whether the call has side effects, rate limits, error behavior, or what data is retained or discarded; the discard information lives only 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 concise sentence and is front-loaded with the main purpose. However, it is under-specified for a tool with nine optional parameters and no annotations; brevity is good, but it omits necessary 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 no annotations, no output schema, and a nine-parameter input, this one-line description is incomplete. It does not state the return format, which parameter to populate, failure behavior, or how this differs from related hint tools, so an agent cannot confidently 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?

Input schema coverage is 100%, so the baseline is 3. The description adds no parameter-level meaning and does not map the vague 'place' to a specific parameter such as city or query, but the schema already documents each parameter, so no lower score is warranted.

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 the tool returns latitude and longitude for a place and names the external source (Open-Meteo). It distinguishes the tool from weather-hint by focusing on coordinates, though it lacks an explicit verb and does not specify which input parameter identifies 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?

No guidance is given about when to use geo-hint versus the many sibling tools, and there are no stated conditions, prerequisites, or exclusions. The single sentence only implies a use case, leaving tool selection to inference.

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