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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions Open-Meteo, implying an external geocoding call, but does not disclose which input is used, whether the call requires network access, failure behavior, or the shape of the returned coordinates.

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 front-loaded sentence with no filler. It conveys the core purpose and external source in ten words, so every word earns its place.

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 9 optional parameters, no required fields, no output schema, and no annotations, this one-sentence description is insufficient for reliable invocation. An agent cannot tell which parameter to pass, what the response structure will be, or how errors should be handled.

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 structured descriptions already document every parameter. The description adds only a loose connection between 'a place' and the city input, but it does not clarify which of the nine optional parameters geo-hint actually consumes or why the other parameters appear in the schema.

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 clearly identifies the tool's output—latitude and longitude for a place via Open-Meteo—and distinguishes it from weather-focused siblings like weather-hint. However, it lacks an explicit verb and does not name or contrast any sibling tool, so it falls short of full differentiation.

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?

Usage is implied: an agent can infer this tool is for geocoding a place to coordinates. But there is no explicit guidance about when to choose this over alternatives, which parameter to provide, or any exclusions or prerequisites.

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