Question

Something of legally sufficient value may consist of the performance of an action that one is otherwise not obligated to undertake. something of legally sufficient value may consist of the refraining from an action that one has a legal right to undertake (called a forbearance).

Answer 1

And something legally sufficient is A promise to do something that one has no prior legal duty to do.
For an agreement to be considered as legally sufficient, consideration must be something of value according to the law. After it  fulfills all those the condition than the legal department could make an interference if either party do not keep their initial agreement.