Email DNS Preflight x402

domain_preflight overlaps heavily with domain_email_security, email_preflight, and domain_rdap, so an agent could reasonably wonder whether to call the broad preflight or a specialized tool. The descriptions clarify focus areas, but the boundaries are not clean enough for a top score.

All tools use snake_case with a domain_ or email_ prefix and descriptive nouns, which is mostly predictable. domain_email_security is slightly longer and stacks prefixes, but the convention remains readable and largely consistent.

Four tools is a tight, well-scoped set for a DNS and email preflight service. Each tool covers a distinct preflight concern, and the surface does not feel either thin or bloated.

The set covers core DNS records, email authentication, RDAP registration data, and email-address validation workflows. Minor gaps such as dedicated DMARC report or blocklist diagnostics exist, but they are not critical for the stated preflight purpose.