How Can I Tell If My Gutters Are Connected to a French Drain?

I recently went under contract on a house and I'm trying to figure out whether the gutters and pipes I saw are connected to a French drain system. The MLS listing mentioned a sump pump and French drain, but during my visit, I only saw the sump pump—no clear signs of a French drain. There are pipes at each corner of the house that go underground, and two pipes that release into the street. Is there a way to confirm if these are part of the French drain system? What should I ask my home inspector to verify its existence and functionality?