Hi guys, just want to ask when you normally want to rent out your shop, do you pass your keys to all the agent that request the keys from you?

The typical reason is once they have your keys, if any interested tenant ask for viewing, they can show them without the owner present. I have pass keys to two of the agent that i know, but lately quite a few agents called me and ask me for keys to help me rent out, but i am skeptical on passing keys to many agent that i do not know...any advice?