Who am I ?

Hi,I run, now, my jobs with steps written in powershell.I would like to get informations about the current job, the current step, I am running.I read some topics about token (like $(ESCAPE_NONEJOBID))) but don't succeed to use it in a powershell step.Is'nt exist more recent method ?Is there some initialized variables like $host or $myinvocation where I can find these informations ?Thank you for your help