Option to use team inbox SLA as attributes in the workflows

It would be great to be able to use the SLAs for team inboxes with response times the same way as we can automatically enter attributes in the messages or notes. Right now the idea I have is for the reusable workflow to be triggered by the agent, which would post current response time for each team that we have, and they would be used to write custom message for the user after the request is passed to relevant team. It is possible to post the ETA with the automation, but this way the agent reply loses points in its individuality and care, so hope you add such an option too :)