Alcove activated only by specific item?

[[SMUG]Ipecac]

Hey guys,

I can't seem to find the script for activating an entitity like an alcove or an altar when a specific item is added.

Can someone point me in the right direction?

This is GRimrock 2 I'm talking about. I found a script from grimrock editor, but it doesn't work.

Ty!

[[SMUG]Ipecac]

This seems like a ubiquitous function in games. You put the sword in the statues hand and the door opens. Other objects won't fit.
Does anyone know how to make this check?