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

No annotations are present, so the description carries the full disclosure burden. It mentions the Open-Meteo dependency but does not explain behavior with the nine optional parameters, what is returned, or why most inputs are described as discarded. This is too thin to anticipate tool 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, economical sentence with no filler; the output and source are front-loaded. It is concise to the point of under-specification, but that issue is captured in contextual completeness rather than conciseness.

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, no annotations, and no output schema, this description is severely incomplete: an agent cannot determine which parameter to provide, what the exact return shape is, or how the 'discarded' fields relate to the returned coordinates. More operational detail and an example are needed.

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 schema already documents all nine parameters and their discard behavior. The tool description adds only the 'place' concept and does not clarify which parameter, if any, selects the place, but it does not need to restate schema details.

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 phrase 'Latitude and longitude for a place via Open-Meteo' clearly names the core deliverable (coordinates) and the data source, and the 'geo' scope differentiates it from weather- and time-oriented siblings. It lacks an explicit verb and does not name sibling alternatives, so it stops short of a 5.

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 choose geo-hint over weather-hint, timezone, or other siblings, nor any instruction about what input indicates 'a place'. The intended use is only implied by the name and output phrase.

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