There is an addon that marks the items needed for the current covetous countess quest items but it only works with the gamepad (
GamepadBuddy).
I would like to see the items required for all covetous countess quests flagged in the tooltip at all times for both keyboard and gamepad UIs (though I will settle for just keyboard). I want to be able to tell at a glance without having to have the quest whether or not my stolen / laundered items should be saved for later use or immediately sold. Having "Covetous Countess" added to the tooltip would be good enough.
FYI - If someone would like to walk me through the code for doing just one item, I'll do the rest of them.