{"ok":true,"name":"cooper_reply_message","description":"Use this when you need to answer a message already in a Cooper inbox, with recipients and threading filled in for you. Requires auth. Sends real email and stores the copy on the same thread. Inputs: inbox_id (required; inbox id, username, or email), message_id (required), text and/or html (one is required), reply_all (optional; default false; when true, also include the other original To and Cc addresses, merge cc, drop this inbox, and dedupe), cc, bcc, attachments, labels, include_signature (op","inputSchema":{"type":"object","required":["inbox_id","message_id"],"properties":{"cc":{"type":"array","items":{"type":"string"},"description":"Extra Cc addresses, merged on reply-all"},"bcc":{"type":"array","items":{"type":"string"},"description":"Bcc addresses"},"html":{"type":"string","description":"HTML body. Provide text or html."},"text":{"type":"string","description":"Plain-text body. Provide text or html."},"labels":{"type":"array","items":{"type":"string"},"description":"Labels stored on the reply. Defaults to [\"sent\"]."},"inbox_id":{"type":"string","description":"Inbox id (inb_…), username, or full email address"},"client_id":{"type":"string","description":"Optional idempotency key. Reuse it to get the original reply instead of sending twice."},"reply_all":{"type":"boolean","description":"When true, also address the other original recipients, drop this inbox, and dedupe. Default false."},"message_id":{"type":"string","description":"Message id (msg_…) to answer"},"attachments":{"type":"array","items":{"type":"object","required":["filename","content_base64"],"properties":{"filename":{"type":"string"},"content_id":{"type":"string"},"content_type":{"type":"string"},"content_base64":{"type":"string"}}},"description":"Optional files, base64-encoded"},"include_signature":{"type":"boolean","description":"Use this when this reply should skip the inbox signature. Default true. false sends the body as written."}}},"serverUrl":"https://cooperemail.com/mcp","transport":"http","handshake":"ok","host":"cooperemail.com","score":93,"grade":"A","auth":"oauth","lastScannedAt":"2026-10-30T13:05:15.807Z","stale":false,"permalink":"https://agentboardai.app/mcp/cooperemail.com/cooper_reply_message","page":"https://agentboardai.app/site/cooperemail.com"}