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

With no annotations, the description carries the full burden of behavioral disclosure, but it only states the output and provider. It does not mention which parameter is used, what happens to the other parameters, or any side effects. The schema mentions 'discarded' for several parameters, but that is 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, which is concise, but it is severely under-specified. It does not provide enough information to be useful, so it is not 'appropriately sized'—concision without substance is a deficiency.

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?

For a tool with 9 parameters, no output schema, and no annotations, this description is drastically incomplete. An agent cannot determine which parameter identifies the place, what the response format is, or any constraints. It fails to compensate for the tool's complexity.

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 input schema covers all 9 parameters with descriptions, achieving 100% schema description coverage. The tool description adds no additional meaning beyond what the schema already provides, so it sits at the baseline of 3.

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 output (latitude and longitude) and the data source (Open-Meteo), but it does not specify which of the 9 parameters identifies the place. The purpose is clear in a general sense but ambiguous regarding the input, making it difficult to distinguish from related tools like weather-hint.

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 on when to use this tool versus its many siblings (e.g., weather-hint, timezone, utc-time). The description does not mention alternatives, prerequisites, or conditions, leaving the agent without any routing information.

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