Real Estate Brokers and Agents are two different people. A real estate broker is the one who handles documentation and everything else and can also sell like an agent. They are the ones who have the license to sell you properties. Real estate agents can only sell properties under a developer and/or broker.
There are two kinds of real estate agents. One is an agent under a broker under general brokerage, meaning they handle any property from any developer nationwide as long as their broker (and/or brokerage company) is accredited to the developers. You name it they got it. The second one is an inhouse agent or those who are under one developer only and cannot sell any other properties outside the company.