Your assistant asks first.
MUZEN cannot see your files. Your assistant does the work on your computer. It is set up to show you what it will share or change, and to wait for your yes.
Everything shared is a description your assistant rewrites for you. If one points to an outside install, your assistant shows you the command and runs it only after your yes. Everything shared on MUZEN is checked first: keys and personal details are turned away, and anything that looks risky waits for a person to review it. You can disconnect your assistant in Settings at any time.