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

No annotations are provided, so the description carries full responsibility. It discloses nothing about side effects, rate limits, authentication, error behavior, or data discarding. The schema mentions 'discarded after the call' for several parameters, but the description itself is silent. This is a major transparency gap.

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 rather than succinct. It omits essential information about which input to provide and what the output looks like. This is not efficient conciseness; it is a lack of necessary detail.

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 9 parameters, no required fields, no output schema, and no annotations, the description is grossly incomplete. It does not explain the return format, the relationship between the many parameters, or any example usage. An agent cannot reliably invoke 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 each parameter has a description. However, the tool description adds no meaning beyond the schema and does not clarify which parameter is the 'place'. Many parameters (ref, url, feed, host, json, path, zone, query) seem unrelated to geocoding. The description fails to map the purpose to the correct parameter, leaving the agent to infer from unrelated fields.

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 clear action and resource: 'Latitude and longitude for a place via Open-Meteo.' This distinguishes it from weather-hint and timezone tools. However, it does not indicate which of the 9 schema parameters represents the 'place', leaving the agent to guess between city, zone, query, or others. The ambiguity prevents a higher score.

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 on when to use this tool versus alternatives. The description only mentions the service (Open-Meteo) and the output (lat/long), but does not specify conditions, exclusions, or alternatives. An agent cannot decide between geo-hint and other location-related tools without further context.

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