With or without scripts?
If you want to do it without scripts, then you need to have an external map event to check that chance and to destroy/remove the item (for example a workbench), because equippable things can't be used (and thereby can't call an event by default).
But even then, the workbench-event would need to be very complex, checking for all possible items in inventory and getting the skills to the correct actors and so on.
With skripts, you could perhaps use one of the scripts that call events on equipping something, asking the player if he wants to equip or analyse the item.
If you want to do it with more than a few special equipments, it would be better to request or commission a script that will process data from notetags for setting the function of a new analyse equipment screen, because with the second option (script call on equip) you would still need a lot of common events to check each item.