"Act like a spy"

Back in drama class we were all assigned a job, as we had to all mingle in that character and tell eachother what we do.

I got spy, and was so confused because doesn't that mean to act like a spy I should be acting not like a spy?

So I discreetly observed people whilst lying to everybody in conversation about what I was or rather who I was supposed to be.

I only reported the truth this nice girl who was some sort of high-ranking government official I decided for the sake of the activity was on the same side. Happy to say, she thought we made a pretty good team too.