That's about the size of it... The gases kill the mold.
The reaction isn't violent in the moviehouse sense. No bubbling explosive stuff. It does kill maggots, don't ask how I know.
You do have to stay out of the enclosed area during that time and then vent the gas to the outside. I usually do it to empty rent houses when folks move out to take the musty smell out of the air.
In that application, one opens all the closets and cabinets and place a container of stuff in every main room.
The next day, I usually start cleaning around the outside of the house, mowing the lawn and such, and let the house vent during that time. Open all the windows and doors. You can go in there no problem but don't stay long as it will burn your throat after an hour or so.
Works on nasty refrigerators too. Just put some in and shut the door.
I should add I am sensitive to mold in nearly all forms. I was exposed when I was little due to a faulty air conditioning unit.
Sometimes I have to do this treatment before I can even work on houses where water damage or the like has occured.
Generally, if one can smell it, one is sensitive to it.