Automation: Comment as Assignee

[Colin]

I want to automate creating a comment, with a template of information that needs to be completed, when a person is assigned.

I have the automation creating the comment and adding the template information but they are all comments from me or if I change the rule Actor then them.

The comment needs to be created by the person the ticket has been Assigned to so they can edit the comment and complete the details on the template.

Is there a way to make the rule trigger be from the person who triggered it, this seems like an obvious thing to me but I cannot see a way to do it.  Or is there any other way to get the comment created from the Assignee?

Thanks