Your Google data.
A specific purpose.

Gmail

Read relevant offer conversations and send offers or replies you choose to send from your connected account.

Read Permission

gmail.readonly — technically covers the mailbox, not just selected offer threads.

Send Permission

gmail.send — sends messages and attachments you authorise.

Application Use

Conversation search, linked correspondence, reply indicators and sending. Message contents pass through the server. Gmail labels and mail deletion are not changed by the current workflow.

Stored Records

Encrypted connection token, account address, conversation links, message identifiers, reply state and send/audit records. Not a permanent mailbox archive.

Google Drive

A Drive connection is not enabled by Gmail authorisation, and no Drive scope was found in the reviewed implementation.

For a future file-selection or export workflow, the proposed starting point is Google’s per-file drive.file permission, where it meets the feature’s needs. The final actions, storage and sharing must be disclosed and approved before release.

No permission is being requested for a speculative future feature.