Clarification versus assent

If person A says, “A hymn is a way to show devotion.” And person B added, “ to a deity.”
So that the sentence is: A hymn is a way to show devotion [to a deity]

Is it correct to say that person B is adding a parenthetical for clarification? Or is person B providing assent to person A’s statement? Or can we not tell what person B’s intent was when he said “to a deity”?