Bulk WHOIS Domain Lookup

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

Annotations already show readOnly, destructive false, idempotent. Description adds: returns structured contacts/registrars, array format, partial failure handling (status=false per domain). No contradictions with annotations.

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?

Two sentences, front-loaded with action. Efficient, though could be slightly more concise. No waste.

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, but description explains output structure (array under bulk_whois_response, per-domain status). Covers failure behavior. Adequate for a bulk lookup with good annotations.

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% with a single parameter well-described. Description adds no additional meaning beyond schema. Baseline 3 as per guidelines.

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?

Description clearly states 'Retrieve live WHOIS data for up to 100 domain names', with specific verb and resource. Distinguishes from siblings like single-domain lookup, as well as other whois tools.

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 explicit when-to-use or when-not-to-use guidance. Agent can infer from bulk vs single, but no contrast with siblings. Implied usage from name and description.

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