Answer:
With sharp edged wit and pointed poise. It can settle disputes without making a noise.
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help. Yet many people are afraid to let me help them.
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
The one who makes it, sells it. The one who buys it, never uses it. The one that uses it never knows that heβs using it.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.