One of the new spells from Xanathar's Guide to Everything is Dragon's Breath. Even though the spell is attacking, nowhere in the spell description does it specifically say that you are attacking with it, only that you use an action. My question is can a familiar that has this spell cast on it use its action to use this spell, or because it's technically considered an attack, would it not be a viable thing for the familiar? And if it is viable, are there any other spells like this that could be used in a similar fashion, essentially allowing your familiar to attack?
Based on What counts as an attack?, I would assume that this would be a perfectly acceptable move, but again, not entirely sure.