We often say we're looking for "stringent" writing. To better explain what we mean, here's a fantastic essay by George Saunders on precision. The first example he sites? Johnny Tremain.
"When a person resolves to improve his prose, everything he is and everything he believes in, consciously or unconsciously, must be brought to bear. The movements from vagueness to precision, from generality to specificity, length to brevity, passivity to activity, involve, mysteriously, a corresponding movement from falsehood to truth."