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

With no annotations, the description carries the transparency burden. It discloses that Open-Meteo is involved and that many parameters are 'discarded,' but it does not explain network side effects, error behavior, or whether the operation is strictly read-only beyond the obvious lookup nature.

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 concise sentence and the schema is cleanly formatted with per-parameter descriptions. It loses a point because the parameter list adds noise without clarifying which fields actually matter.

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?

The tool cannot be confidently invoked from the definition alone: there is no output schema, no required field, and no explicit mapping from 'a place' to a schema parameter, so an agent would have to guess the input contract.

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?

Although every schema parameter has a description, none clearly identifies the place input needed for latitude/longitude. Many descriptions say the value is 'discarded' or tie it to unrelated purposes, leaving the agent to guess between city, query, zone, or another field.

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 specific outcome ('latitude and longitude for a place') and names the method ('via Open-Meteo'). It is clear what the tool does, though it does not explicitly distinguish it from sibling tools like weather-hint.

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?

The description gives only a general sense of usage. It does not say which parameter contains the place, when to prefer this tool, or how it differs from weather-hint, timezone, or other possible alternatives.

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