Outlook MCP: add create_mail_draft / create_reply_draft (Graph draft, no immediate send) #450

Summary

The official Outlook plugin can read mail and send immediately (send_mail, reply_to_mail_message), but it does not expose Microsoft Graph draft APIs. Gmail MCP already has create_draft / update_draft. Outlook users need the same safe pattern: agent prepares a draft → user reviews in Outlook → user sends.

Problem

• reply_to_mail_message sends immediately (per tool description).
• There is no create_mail_draft tool (create_mail_draft → tool not found on plugin-outlook-outlook).
• Without draft tools, agents cannot create a reply in the mailbox Drafts folder with attachments for human review.

Requested tools

1. create_mail_draft — create draft message (isDraft: true) with to/subject/body and optional attachments.
2. create_reply_draft / create_reply_all_draft — Graph createReply / createReplyAll with comment; returns draft id; does not send.
3. update_mail_draft (optional) — update draft fields/attachments.
4. send_mail_draft (optional, explicit opt-in) — send by draft id; otherwise users send from Outlook UI only.

Microsoft Graph references

• https://learn.microsoft.com/en-us/graph/api/message-createreply
• https://learn.microsoft.com/en-us/graph/api/user-post-messages

Plugin path

third_party/outlook — https://github.com/cursor/plugins/tree/main/third_party/outlook

Reporter

• GitHub: @shahaman098
• Outlook account used with plugin: aman.k.sah@outlook.com
• Verified via get_me on connected Outlook MCP

Thanks.