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

With no annotations, the description must carry the behavioral disclosure burden, but it only says 'via Open-Meteo,' implying an external lookup. It does not explain network use, rate limits, read-only behavior, side effects, or what happens to the diverse inputs in the schema.

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, front-loaded sentence with no fluff. It earns its brevity, but it is almost too terse given the complex 9-parameter schema and absence of annotations.

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 9 optional parameters, no annotations, and no output schema, the description is materially incomplete. An agent cannot determine which parameter to provide, what the returned coordinate shape is, or what behavior to expect from the tool.

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 description coverage is 100%, so the baseline is 3. The description adds no parameter-level meaning beyond the schema; it says 'for a place' but does not clarify which of the nine optional inputs should be used to obtain the latitude and longitude.

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 'Latitude and longitude for a place via Open-Meteo,' which conveys the output domain and the external provider, but it lacks a clear verb and does not map any of the nine input parameters to 'a place.' This is enough to suggest a geocoding/coordinate tool, but not enough to know how to invoke it.

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 geo-hint, when not to use it, or which sibling tool to prefer instead. The description does not mention alternatives like weather-hint, timezone, or other location-based tools, and no exclusions are provided.

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