Generally speaking the friendly AI of your three
squadmates is solid, allowing you to leave them to their own devices without worrying about them getting in trouble, but occasionally they'll refuse to
move from spots, won't line up sync - shots, which lets you mark four targets and take them all down simultaneously, or will sometimes go sprinting past guards while somehow still being in full camouflage mode and not getting spotted.
You only have indirect control over your
squadmates, and beyond telling them to
move to specific locations they'll just do their own thing during a firefight.