Some operations, for example contour_profile or adaptive milling, have variables for the property attributes. Like: KEYPERATION_CONTOUR_PROFILE, KEYPERATION_ADAPTIVE_MILLING, KEY:ADAPTIVE_MILLING_TITLE instead of plain text.
Is this something you can use yourself? If I make something like KEY:MY_CUSTOM_OPERATION, where can I put the value needed for this variable?
If you want custom texts inside operation attributes this will make things a lot easier.