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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds the useful 'currently-active' freshness signal and enumerates alert classes, but says nothing about whether the five location inputs are mutually exclusive, how they combine, or what volume/format of alerts comes back.

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?

A single front-loaded sentence with the resource first and the targeting modes last; the parenthetical hazard list is informative rather than filler. No wasted clauses.

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?

With zero required parameters out of five, an agent cannot tell from the description or schema whether calling with no arguments returns all national alerts or fails. That omission matters for a 5-optional-param tool, though the absence of an output schema is not a gap since return values need not be described.

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 each parameter is already documented with examples and bounds. The description adds a little by mapping the parameters into three conceptual targeting modes (point via lat/lon, state, NWS zone), but does not resolve the key ambiguity of whether exactly one mode must be supplied or which takes precedence.

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 resource (currently-active NWS alerts) with the covered hazard categories and the three targeting modes (point/state/zone). This is clearly distinguishable from weather_current and weather_forecast by resource type, though the description never names those siblings explicitly.

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 when-to-use or when-not guidance: nothing tells an agent to prefer this over weather_forecast/weather_current, nor whether it is for real-time safety checks versus historical disaster data (disaster_declarations). Usage is only inferable from the phrase 'currently-active'.

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