I want to set up that someone can edit a pending worker but cannot add a pending worker.

I need help understanding what attribute in the approval workflow I can use so that if the transaction header contains "Edit Pending Worker" under the Add Pending Worker transaction, then it will auto-approve. However, if the header is "Add Pending Worker" then it will auto-reject.

I understand how to set up the auto-reject for just Add Pending Worker but cannot figure out what attribute from the transaction approval request to choose for the transaction header.

Highlighted in red below is the field from the transaction diagnostic report that I am trying to map to the highlighted in red field on the approval rules.