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

With no annotations, the description carries the full burden and does well: it discloses the forecast inputs (wind gusts, convective potential, winter/sustained precipitation, heavy cloud cover), the 6-hour score granularity, the 48-hour horizon, and the HTTP endpoint, x402 price ($0.02), and docs URL. It does not mention rate limits, caching, or freshness beyond the 48-hour window, so it is strong but not exhaustive.

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?

Front-loaded with the essential scope (MCO, 48 hours) and keeps the operational detail (pricing, path, docs) compactly bracketed at the end. There is mild redundancy between the first sentence and the longer restatement in the second, but every part is short and 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?

For a no-parameter, no-output-schema, no-annotation tool, the description covers what is returned (component risk scores), the resolution (6-hour) and horizon (48 hours), the cost, and where to find docs — enough for correct invocation. It lacks explicit return-format details, but with no output schema and a documented API shape it is reasonably complete.

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 tool takes zero parameters (empty object schema), so per the rubric the baseline is 4. The description correctly implies no input is required, being a fixed MCO-bound endpoint, and adds no misleading parameter guidance.

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?

States a specific verb and resource: weather-driven delay risk for Orlando International (MCO) over the next 48 hours. It explicitly ties itself to the generic delay-risk endpoint ('bound to MCO'), so an agent can distinguish it from weather_aviation-delay-risk and from the sibling airport variants (atl, bos, etc.) without opening a schema.

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 phrase 'Same shape as the generic delay-risk endpoint, bound to MCO' gives clear context: pick this when the target field is MCO, and the parent endpoint exists for other/any airports. It does not spell out explicit when-not conditions or note that the other airport siblings are alternatives, so it stops short of a 5.

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