Email Preflight

email_check_mini and email_preflight both check email syntax and MX, and email_preflight is a superset at the same price, so agents cannot easily tell which one to choose. url_preflight is distinct, but the two email tools create real overlap.

All names use snake_case, but the set mixes a 'check_mini' action with two 'preflight' names, so the pattern is not fully predictable. Still readable, just not uniform.

Three tools is reasonable for a narrow preflight service, and each maps to a check type. However, the redundant mini variant slightly inflates the set without adding capability.

The email tool covers syntax, domain, MX, disposable, role, and free-provider checks, and URL inspection is present, so the core preflight surface is covered. Only batch or bulk operations are missing, which is a minor gap.