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Google Contacts: List or search Other contacts — MCP tool

Google Contacts MCP tool: Lists or searches "Other contacts" — addresses Google auto-saved from the user's interactions.

Technical name: list_other_contacts

What task it solves

I want to see people I've emailed but never saved.

Lists (or, with query, searches) "Other contacts" — the auto-saved addresses that live outside the saved contact list.

When to use it

Use it when a person the user has corresponded with is missing from list_contacts/search_contacts — they are often here. Follow up with copy_other_contact to make one a real contact.

What to provide

  • query — optional. Search text; switches to search mode (max 30 results, no pagination or sync).
  • read_mask — optional. Only names, emailAddresses, phoneNumbers, photos, metadata exist here.
  • page_size, page_token, request_sync_token, sync_token — optional, listing mode only.

What it returns

otherContacts[] (or results[] when searching) with otherContacts/... resource names.

What changes in Google Contacts

The tool reads Google Contacts data and does not change it.

Example request

Find bob@ among the people I've emailed but never saved.

Errors and limitations

Requires the contacts.other.readonly OAuth scope — a 403 means the refresh token was minted without it. Other contacts are read-only; the only write is copying one into My Contacts. Expired sync tokens fail with 410 — re-list in full. Access also depends on token permissions, quotas, and upstream API limits.

Related MCP tools

Technical details