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

No annotations, so the description carries the burden. It does disclose two useful traits beyond the schema: a hard radius cap of 300 km and that results include 'full text'. It omits auth/permission requirements (only implied by 'PRO' and the access_token schema note), result ordering, and what 'active' means.

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 compact sentence with the key constraints front-loaded; 'PRO' and 'with full text' both earn their place. Slightly clipped at the cost of clarity about defaults.

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?

No output schema and the description only says 'full text', leaving the alert payload structure, ordering, pagination and error behavior unexplained. For a tool requiring an auth token, this is under-specified.

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 only 33%, but the description compensates for the most important gap by giving the radius unit (km) and maximum (300). postal_code semantics are clear from the name; access_token is documented in the schema. Missing: what happens if radius_km is omitted (default?).

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 concrete verb-like action (retrieve) on a specific resource (active alerts) scoped by radius around a postal code. The 'PRO' marker and scope hint at the difference from weather_alerts, though the sibling distinction is not spelled out.

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?

No guidance on when to use this versus weather_alerts or sites_check. The radius/postal-code scoping is implied but exclusions and prerequisites (e.g., needing a subscriber token) are left unstated.

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