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

No annotations are present, so the description carries the full burden of behavioral disclosure. It does not mention side effects, return format, rate limits, or what happens when multiple parameters are provided. The schema property descriptions mention values being 'discarded', but the tool description itself offers no such transparency.

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 short sentence, which is concise, but it is under-specified rather than efficiently communicative. It omits critical information and would need substantial expansion to be useful.

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?

With a complex schema containing seven parameters, no output schema, and no annotations, this description is entirely inadequate. An agent cannot infer the tool's behavior, expected inputs, or return values from the text provided.

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 schema provides descriptive text for every parameter, so coverage is high, giving a baseline of 3. The tool description adds no parameter-level meaning beyond the single 'city' reference, but the schema descriptions do the heavy lifting.

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 a specific result ('Latitude and longitude for a place via Open-Meteo'), but it is a noun phrase with no verb and does not explain why the input schema includes seven unrelated fields (ref, url, feed, json, path, host). This makes the tool's actual purpose ambiguous and potentially misleading to an agent.

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 this tool instead of siblings like weather-hint, timezone, or domain-shape. The description provides no context for selection.

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