Easily recognise and distinguish between individual user and shared actions (without having to hover over and look at the name) - everyone producing a nice piece of code would want a cute, unique icon in the GUI of their colleagues as the cherry on the cake, right? In the 'Shared Custom Actions' dialog box, there would be a browse to ICO / PNG file entry, or you just put the ICO / PNG in the same place as your Ruby script, with the same name.
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This is currently available in a limited fashion. You can customize the icon and add a text description: https://help.autodesk.com/view/IWICMS/2025/ENU/?guid=GUID-E399EDE5-CC81-4B7A-9D1A-663D563A3403
Attached is an example of adding descriptive text to a shared action.