The #showtooltip instruction
You can re-enable tooltips using the #showtooltip [item name or spell name] instruction.
Examples
#showtooltip Cone of Cold(Rank 1)
/cast [mypower>200] Cone of Cold(Rank 1)
#showtooltip Mish'undare, Circlet of the Mind Flayer
/use Linen Bandage