How can I use the 'EventDescription' column for creating labels in task mining when it's not available in the 'Create Label' menu?

I'm trying to add labels based on the 'EventDescription' column for task mining:

However, this column doesn't appear in the dropdown menu of the 'Create Label' interface, which seems to limit the available columns for labeling:

Does anyone know how to include this column or any similar unlisted columns in the labeling rules? Looking for any advice or workarounds. Thanks!