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

With no annotations, the description carries the full burden. It usefully discloses the return content (coverage areas, last-checked date, related servers) and that the call is free, which is real behavioral context. It does not mention authentication, rate limits, or freshness semantics beyond the date field.

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 no filler; every clause contributes either scope or cost information.

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?

Although there is no output schema, the description summarizes the return payload (coverage list, last-checked date, related servers), which is sufficient for a zero-parameter discovery tool. Minor gaps remain around auth or freshness semantics, but nothing essential is missing.

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, so the schema imposes no semantic burden and the baseline of 4 applies. The description correctly implies a no-argument listing call.

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 ('Lists') and resource ('coverage'), then enumerates exactly what is covered (US states, US federal sector rules, countries), the last-checked date, and related servers. It is clear and specific, though it does not explicitly distinguish itself from the sibling list_breach_laws, which is also a list-style tool.

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 only implied: an agent can infer this is a discovery/first-call tool to learn what data is available, and 'Free' hints at a cost consideration. But there is no explicit when-to-use, when-not-to-use, or reference to the sibling tools list_breach_laws or who_to_notify.

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