There is no variable with that information, but you can use the API to get information on the previous steps. Here is an example of getting the status for all the steps so far. You can format that information as you wish and then do the notification. A few ways to do the notification:

• Have it put the information in a Job Variable (using adTempus.JobVariables.Add), then have a subsequent Notification Action or Response that uses the variable. Easiest way to manage the notification message recipients, text, etc.
• The script can use adTempus.SendNotificationMessage to programmatically create the message. More flexible but harder to maintain.