Anything that's spoken laconically gets right to the point using very few words. If the characters in your new play speak laconically, you'll write more stage directions than dialogue.
This adverb comes from a Greek root, Lakonia, the name of a region in ancient Greece known for its citizens' skill at making convincing arguments using very few words. If your best friend has a similarly terse style, that means they also speak laconically. Talking this way makes speeches shorter, debates quicker, and conversations full of long silences.