However, sometimes one of the parties prepares a document believing it to be a valid and enforceable agreement only to find, after expensive litigation, that it was not a binding agreement at all but merely a non_binding, non_enforceable agreement to agree, letter of intent."
In the body paragraph you will basically express your interest in taking admission. Important things you are going to mention include the basis for applying to the school. Why do you think this school can build up your career? List down all academic achievements and special skills that would help in making your letter stand out from rest of the applicants.