For folks who are curious about what it actually does, check out the garak/data/ subdirectory. For the most part, it just seems to have an array of static prompts, e.g.:
https://github.com/NVIDIA/garak/blob/main/garak/data/donotan...
replies(3):
https://github.com/NVIDIA/garak/blob/main/garak/data/donotan...