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

With no annotations, the description carries the full behavioral disclosure burden, but it only mentions 'via Open-Meteo.' It does not disclose that this likely makes a network call, what output format to expect, failure modes, or that many input parameters are explicitly 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 single sentence is efficient and front-loaded, but for a tool with 9 parameters and many siblings it is under-specified. This is closer to minimalism than appropriately concise, useful documentation.

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 9-parameter tool with no annotations and no output schema, the description is incomplete: it does not tell the agent which parameter to populate, what the returned coordinates look like, or when this tool is the right choice. The schema covers parameter meanings but not usage context.

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?

The schema already documents all 9 parameters with individual descriptions, so the baseline is 3. The tool description adds almost no parameter-level meaning and does not connect 'a place' to the 'city' parameter, but it is not required to repeat 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 description states that the tool returns latitude and longitude for a place using Open-Meteo, which communicates the core purpose clearly. It does not explicitly differentiate from siblings like weather-hint or timezone, but the geographical output is specific enough.

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 instead of a sibling, nor which of the 9 optional parameters should be supplied. An agent cannot determine whether to pass city, url, host, or another field, and no alternative tools are mentioned.

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