An "agreement to agree", where a purported contract contains an obligation to enter into a subsequent agreement in the future, the terms of which are not certain at the time of the initial agreement, is generally considered to lack sufficient certainty to constitute a legally enforceable contract and is therefore unenforceable.
A purported contract that contains a provision obligating the parties to enter into a future agreement with unspecified terms is typically not considered sufficient to establish a legally binding contract due to its lack of certainty.