Answer:
Spies and detectives do this to phones and musical shoes make this sound.
It covers you, you lose it every day and you'd die without it.
What grows when it eats, but dies when it drinks?
It's shorter than the rest, but when you're happy, you raise it up like it's the best. What is it?
Tomorrow's yesterday. Yesterday's tomorrow. What is it?
If you can spot one of these eastern warriors, it means they're not doing their job right.