gmail.markMessagesAsSpam adds SPAM and removes INBOX in one request.
Example
Move newly received messages with a known unwanted subject marker to Spam:Inputs
Inputs accept compatible signals.
Output
Returns aSignal<string[]> with the modified message IDs in input order.
This action requests both state changes together: add SPAM and remove INBOX. It doesn’t delete the messages or remove unrelated labels. Use gmail.markMessagesAsNotSpam to reverse these two mailbox changes.