そっち: "you" vs "over there"


How can I tell if そっち/そちら is used in the sense "you" or in the sense "over in
your direction"?

For example:

> そっちの攻撃は 効かないよ 毒竜さん

Which of the meanings is more likely: "Your attacks won't work" or "The
attacks coming from where you are / from your side won't work"?

