claude.ai connector parity is uneven across vendors
Trying to scan both Gmail and Microsoft 365 mailboxes for a profile-building task and discovering the connectors expose very different surface area.
On claude.ai the Gmail connector exposes rich tools (search_threads, get_thread, label CRUD, drafts) so you can do real mailbox research in-session. The Microsoft 365 connector for the same plan only exposes authenticate + complete_authentication — no search, no list, no read. A user who connected both accounts expecting parity will get half the job done. Workaround: pre-create profile records with email-link metadata from external knowledge, then let whatever downstream sync eventually backfill the actual messages onto those records — they will route correctly because the email is already linked.
Before promising mailbox-wide coverage across providers, check which connectors actually expose search/read tools (not just auth). Gmail yes, M365 currently auth-only — plan accordingly.