To become an Agent you must be a nice Chobot. You must help and welcome new Chobots. Agents can have Blogs that are useful and friendly. If you breake the rules when you are an Agent, you will be de-agented and will NOT be given your badge back. Agents should also play Chobots regularly, and know the game well. Be paitent, it takes time to become an Agent. You will be noticed, so don't worry.
P.S. I hope this helps!