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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It reveals only that the tool uses Open-Meteo, with no mention of network calls, side effects, error behavior, rate limits, or the fact that most inputs appear to be discarded.

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 brief and front-loaded, with no filler. However, it is under-specified for a tool with nine parameters and no annotations, so the brevity is not fully appropriate to the tool's complexity.

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 nine parameters, no output schema, and no annotations, the one-sentence description is insufficient. It does not specify which parameter selects the place, what the return value looks like, or what failure modes exist, making it hard for an agent to invoke correctly.

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. The description adds no parameter-level meaning and does not connect 'a place' to the city parameter among nine schema properties, leaving the agent to infer which input to supply.

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 the core function—returning latitude and longitude for a place—and names the external service, Open-Meteo. It is reasonably clear but lacks an explicit verb and does not identify which input parameter represents the 'place', so it stops short of a top 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?

There is no guidance on when to use this tool versus alternatives such as weather-hint or other sibling tools. The description only implies use when coordinates are needed, but it does not state prerequisites, exclusions, or how to choose between geo-hint and related tools.

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