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

No annotations are provided, so the description carries the full burden. It usefully discloses the upstream source (NWS) and that only currently active alerts are returned, but says nothing about update frequency, severity/urgency fields, empty-result behavior, or whether marine and offshore zones are included.

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 well-formed sentence with the scope front-loaded and the optional filter trailing. Nothing is wasted and nothing is buried.

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 simple read-only tool with one optional parameter and no output schema, the description is nearly sufficient. The only meaningful gap is the missing boundary against the sibling weather tool, which an agent would benefit from given five Hawaii-related siblings.

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 100% and the single island parameter already enumerates the valid values in the schema. The description's 'optionally filtered by island' merely restates the optionality, adding no new semantics beyond 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?

States a specific resource (active National Weather Service alerts in Hawaiʻi) and enumerates concrete alert types (surf, flood, wind, tsunami), so the agent knows exactly what data comes back. It does not explicitly distinguish itself from the sibling get_hawaii_weather, leaving ambiguity about whether forecasts and alerts overlap.

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 by the word 'Active' — this is the tool for current hazard notifications rather than general conditions. However, it never states when to prefer it over get_hawaii_weather or get_hawaii_headlines, and offers no exclusions or prerequisites.

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