I did not know this was a thing that I wanted untill now

I propose they could add /mtt or /macrotooltip that follows the same rules as /micon, so if I /mtt "Fat cat" minion, the macro displays the fat cat minion tooltip

Expanding further in the feature, a /macrodescription or /mdes to add a custom tooltip on the macros could be very nice, to say, label your Crafter or fisher macros more detailed, or describe what the intended use for the macro is