@Gut.of.REM. is correct this is for an object that is strapped to a character's mouth.

I am always looking at this tag, and I think many others are as well, when it is bondage related and involving a person having their speech muffled or prevented specifically by something, and not just gag reflex.

I mean, if you say so then sure I guess? I'm just trying to give description for some of the tags.

This is going to have to be a special case where we make multiple tags to split out each one of those things.

There needs to be a differentiation between a gag object, a person gagging and a person being gagged.

Any object or material strapped, tied, wrapped, or placed over or inside a ones mouth to prevent or muffle speech.