Read, search, inspect, download, organize, move, mark, and delete Mermail emails and threads, and manage mailbox folders or custom-label definitions from Claude, Codex, or another external MCP client. Use for ordinary inbox search and cleanup, bounded thread context, attachment retrieval, read/star state, exact bulk operations, folder CRUD, label CRUD, draft discard semantics, or trash management. Use mermail-agent-inbox for expected verification mail and mermail-compose-email for composing or sending mail.