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

With no annotations, the description carries the full burden. It discloses the data source (Open-Meteo) and the output type (latitude/longitude), but it fails to explain that most inputs are discarded after validation, that zero parameters are required, or that network calls may be involved. The schema's repeated 'discarded after ...' descriptions contradict the implied focused geocoding behavior.

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 with no fluff, but it is under-specified for a tool with nine optional parameters and a complex discard behavior. It omits critical disambiguation, so it is not 'appropriately sized' despite being brief.

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?

The tool has 9 parameters, zero required, no annotations, and no output schema. The description gives only a one-line purpose and leaves the agent to guess which parameters are relevant, what the tool returns beyond the claim, and how the parameters relate to the stated purpose. This is far from complete.

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 detail; it only mentions 'a place' without mapping to the city, host, or query parameters. It neither clarifies nor conflicts with the schema descriptions, so it stays at baseline.

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 is a noun phrase, not a clear verb+resource statement. It claims the tool returns latitude/longitude for a place, but the input schema lists nine unrelated parameters (e.g., 'url', 'feed', 'json') with descriptions like 'discarded after the shape check', which suggests the tool is actually a validation utility. The stated purpose is therefore ambiguous and potentially misleading.

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?

The description provides no guidance on when to use geo-hint versus siblings like weather-hint, timezone, or domain-shape. There are no usage conditions, exclusions, or alternatives mentioned, leaving the agent without routing information.

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