Gmail

Search, ground, and act on your Gmail in Glean

Authorize Google Tools and Glean gets read and write tools right away, so it can search threads, read messages, and draft and label email for each user. Turn on data crawling and indexing for permission-aware search over your email.

EmailRead and write toolsGmail MCP (central or custom app)Permission-aware

Set up GmailGmail overview

At a glance

Authentication

Gmail MCP over OAuth (central or custom app), plus domain-wide delegation for indexing

Tools

Read and write tools via Gmail MCP, each run as the asking user

What it indexes

Email threads and their metadata. By default, approximately 6 months of history and up to 5,000 Inbox threads per user

Permissions

Respects each person's Gmail permissions, and email stays scoped per mailbox

Sync

Full content crawl about monthly

Choose your path

Which path is yours depends on your Glean deployment, not on when you personally connect Gmail.

Onboarding

New setup

You're on a new Glean deployment, created on or after August 14, 2026. Authorize Google Tools once and Glean gets read and write tools right away. Turn on data crawling and indexing to add permission-aware search.

Previous setup

You're on an existing Glean deployment. Even if you're connecting Gmail for the first time, keep the setup you have to manage domains, delegation, indexing scope, and the crawl.

Not sure which is yours? Choose your Gmail setup.