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

With no annotations provided, the description carries the full burden. It mentions using Open-Meteo but does not disclose network behavior, rate limits, error handling, or what happens to inputs. Several parameters are said to be 'discarded after the call,' but this is not explained in context of the tool's purpose.

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 under-specified for a tool with nine parameters and no output schema. It lacks front-loaded essential information and does not earn its brevity.

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 nine optional parameters and no output schema, the description is severely incomplete. It does not explain what the output looks like, how to select the place, or any prerequisites. An agent cannot call this tool correctly based on the provided information.

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 the baseline is 3, but the description adds nothing to clarify which parameter is the place specifier. The schema descriptions themselves are confusing (e.g., 'city' is for a 'public weather hint'), and the tool description does not disambiguate them.

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 that the tool provides latitude and longitude for a place via Open-Meteo, but it does not explain how to specify the place. The input schema has nine optional parameters, none of which clearly identify a place; 'city' and 'query' are described ambiguously. This vagueness fails to distinguish the tool 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?

There is no guidance on when to use this tool versus alternatives. No sibling tools are mentioned, and the description does not clarify which parameter to supply for the intended purpose. An agent would have no idea how to invoke it correctly.

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