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

With no annotations, the description must carry the behavioral burden. It only reveals an external dependency on Open-Meteo; it does not disclose that most inputs are discarded, which input triggers the lookup, whether a network call is made, or what the response contains.

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 one-sentence description is front-loaded and free of fluff, but it is severely under-specified for a tool with nine optional parameters and no output schema. Conciseness here comes at the cost of necessary information.

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?

An agent cannot reliably invoke this tool correctly: it does not know which parameter to populate, what the return value looks like, or what happens when multiple unrelated parameters are supplied. With no output schema and no annotations, almost all invocation context is missing.

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 descriptions cover 100% of the parameters, so the baseline is 3 and the top-level description is not obligated to repeat them. Still, the description adds no clarity about which parameter represents the place, and the schema note that city is 'discarded after the call' conflicts with the apparent geocoding purpose.

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 recognizable operation—returning latitude and longitude for a place via Open-Meteo—so it is not a tautology. However, it never maps 'a place' to any of the nine schema parameters, and the unrelated parameter names make the intended target ambiguous.

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 about when to prefer geo-hint over sibling tools such as weather-hint, timezone, or normalize-url. No preconditions, exclusions, or alternative routing are mentioned, leaving the agent to infer usage from the tool name alone.

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