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

With no annotations, the description carries the full burden and does reasonably well: it discloses that results combine active NWS alerts with model-derived risk context, that scope is limited to US points, and that access costs $0.01 via x402 at a documented HTTP endpoint. It stops short of describing return format, freshness, or what happens when no alerts are active.

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 and reasonably sized, but the hazard restriction is restated three times ('hurricane and tropical storm risk', 'filtered to hurricane and tropical storm hazards', 'hazard class fixed to hurricane and tropical storm'), which is redundant. The bracketed endpoint/pricing/docs line is dense but useful.

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 3-parameter, no-annotation, no-output-schema tool, the description covers purpose, sources, and access cost, but leaves real gaps: the `state` parameter, required-parameter semantics, geographic validation behavior, and what the response contains. Adequate rather than 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?

Schema description coverage is 0% for all three parameters, so the description must compensate and does not. 'For any US point' loosely explains lat/lon, but the `state` parameter is never mentioned and neither is the fact that zero parameters are required or how lat/lon and state interact (AND vs OR semantics).

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+resource (active and forecast hurricane/tropical storm risk) and explicitly scopes it to hurricane and tropical storm hazards for a US point. It also distinguishes itself from siblings by naming the severe-alerts analogue and describing the difference as 'the hazard class fixed', which lets an agent separate it from weather_alerts_tornado, weather_alerts_flood, etc.

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?

Gives clear context: any US point, hurricane/tropical-storm hazards only, with model-based risk context alongside NWS alerts. It references /v1/alerts/severe as the same shape, implying the routing rule, but never states an explicit 'when not to use' or which sibling to pick for other hazard classes.

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