> A PR with a minimal title and empty description should be refused at submission

Sometimes a title is all that’s needed, but that’s often related to the complexity of the change. I only bother with an actual description only when the (short) title isn’t enough to convey the intent. But it’s very rare to go past one paragraph. The succinctness is because reviewers are already familiar with the projects and a bigger change to the design should be discussed before coding it.