What is a “Reasonable” Non-Competition Agreement?

In Texas, “the hallmark of enforcement [of non-compete agreement] is whether or not the covenant is reasonable.” 

Enforcing Non-Compete Agreements in Texas – The Issue of Consideration

In this state, the consideration must have a “reasonable relationship” to the employer’s interest in restraining the employee from competing. Simply restricting an employee from lawful competition for the sake of preventing competition will almost certainly fail.