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

With no annotations present, the description carries the full behavioral disclosure burden. It only reveals that Open-Meteo is the underlying service, but says nothing about side effects, input handling, network dependencies, rate limits, or whether the operation is read-only. The schema mentions that many inputs are discarded, but the description itself does not.

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 short and front-loads the intended output, with no wasted words. However, it is an under-specified fragment rather than a structured tool explanation, and its brevity omits context that is essential given the large, heterogeneous input schema.

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?

Given an 8-parameter schema, no annotations, and no output schema, this description is far too incomplete. It fails to explain which input to provide, what output format to expect, when the tool is appropriate, or how it behaves—leaving an agent with almost no reliable basis for correct invocation.

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?

All eight schema properties have descriptions, so the schema already carries most parameter semantics. The description adds only the vague notion of a 'place' but does not specify which parameter represents that place, leaving real ambiguity given fields like ref, feed, host, and json.

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 communicates the core idea—latitude and longitude for a place via Open-Meteo—but it is phrased as a noun fragment rather than a clear verb-driven action. It does not meaningfully distinguish geo-hint from siblings like weather-hint or timezone beyond the output type, especially since the input schema lists many unrelated fields.

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 use this tool versus alternatives like weather-hint, timezone, or normalize-url. No exclusions, prerequisites, or conditions are provided, leaving the agent to infer usage entirely from the tool name and schema.

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