What Makes a Boundary Clear Without Overexplaining?

“I can’t take that on this week” names a limit; a longer explanation might add useful context—or blur the limit. The right amount can depend on the relationship, the stakes, and whether the other person needs a practical alternative.

When you need to set a boundary, what helps you decide how much to explain? What wording feels both honest and respectful, without turning your limit into a debate?