To start, there is the 15% runway length buffer ("dispatch landing performance") required for a wet-runway landing per FAR 121.195(d):
(d) Unless, based on a showing of actual operating landing techniques on wet runways, a shorter landing distance (but never less than that required by paragraph (b) of this section) has been approved for a specific type and model airplane and included in the Airplane Flight Manual, no person may takeoff a turbojet powered airplane when the appropriate weather reports and forecasts, or a combination thereof, indicate that the runways at the destination airport may be wet or slippery at the estimated time of arrival unless the effective runway length at the destination airport is at least 115 percent of the
runway length required under paragraph (b) of this section.
Then, if the dry runway is of marginal length for the planned landing configuration, a "damp" runway may or may not lead to an overrun or unplanned heavier brake usage. Specific runway, airplane, and operating procedures set up all kinds of permutations...