hijack_registrar_security

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

With no annotations, the description carries the full burden. It discloses the checks performed but does not explicitly state read-only behavior, possible side effects (e.g., network requests), or error conditions. The absence of annotations makes this a partial disclosure, though the description gives meaningful detail about what is verified.

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?

The description is a single, tightly worded sentence that front-loads the main action and resource, then adds specific details about what is checked. Every word adds value, and there is no redundancy or filler.

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 tool with a single parameter, no output schema, and no annotations, the description is largely sufficient. It explains what the tool does, how it works (via RDAP), and what status codes it checks. It does not describe return values, but that is less critical given the simple scope and lack of an output schema.

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% for the single 'domain' parameter, so the schema already documents it well. The description adds no additional parameter semantics beyond what the schema provides (e.g., it does not explain domain formats or special cases). Baseline 3 is appropriate given the high schema coverage.

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?

The description clearly states the specific verb+resource: 'Check domain registrar security posture via RDAP.' It explains exactly what it verifies (transfer locks, delete locks, registration expiry, EPP status codes) and distinguishes itself from sibling tools like hijack_dangling_cname and domain_whois by focusing on registrar-level protections.

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?

The implied usage is clear from the purpose—use it to assess registrar security—but there is no explicit guidance on when to choose this over alternatives from the many sibling tools. It does not mention exclusions or direct comparisons, so an agent lacks explicit decision-making support.

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