So you've been swallowed by a Giant Toad. Oops. Your fellows are sure to kill it soon enough, but you want to do something in the meantime.
"Well," you say, "perhaps I'll attack the toad from the inside!"
"Ah," says God (you're used to God commenting on your intended actions), "But remember, you're blinded and restrained. So any roll you make is with Disadvantage." (You are also used to God using bizarre terminology to describe your life like some sort of game. You roll with it.)
"But I am surrounded on all sides by toad! Surely that would involve some advantageous modifier!"
"You are restrained by the toad's gullet," replies God, "your arms can't move well enough to attack effectively, even if you weren't blind."
Phooey. You think to yourself for a moment. "Perhaps I'd better cast a spell, then," you say, "Magic Missile doesn't even require an attack roll! Oh, but, drat, I need to see the target, don't I? Perhaps I should cast Light on any given object on my person first."
"It's not just dark, you're blinded," says God, "Light will do nothing. Neither will torches, lanterns or whatnot."
"Are you suggesting that my face is always pressed up against some portion of the frog's anatomy? Restrained or not, it feels like I should have at least the range of motion to remedy that!"
So, is there any indication whatsoever that you can ever see the toad that you are inside of enough to target it with a spell?