There may be more predators lurking in the dark corners of the writing and publishing world than there are in any other industry. No required education or certification process separates outstanding professional editors, agents and publishers from villains. Either you find the villain before you sign a contract, or they make easy money from you in return for... nothing.
Contacting an agent or a publisher is not simple or free of risk. As your author platform constitutes everything positive about you as an author, the way you deliver that platform is absolutely critical. In essence, you have a few sentences to sell yourself.