List connected Google accounts (alias -> email).

Diagnose setup: credentials file, connected accounts, and whether each account's Gmail API actually responds.

Search mail with Gmail's full query syntax (from:, subject:, is:unread, older_than:1y, has:attachment, ...). account is an alias, an email, or "all" for every connected account.

Read one message's full body by the id from gmail_search.

List label names for one account.

Batch-modify up to 500 messages in one account: add/remove labels (created automatically if new), archive (leave the inbox), mark read. Reversible — nothing is deleted.

Create a draft (does NOT send). Safer default than gmail_send.

Send an email from one account. Always confirm with the user first.

List calendars for one or all connected accounts.

List events between two ISO dates/datetimes across one or all accounts. calendar_id defaults to each account's primary calendar.

Create an event, optionally inviting attendees by email (Google sends real invitations — confirm with the user first when inviting).