Tucker returned without discerning any enemy presence. This shouldn't be all that surprising. He had a lot of ground to cover on a day which started out foggy and then became quite dusty.
Sullivan would later report to John Hancock that just two members of the Light Horse had the entire front to scout. During the Battle of Brandywine, Sullivan was generally hamstrung by a lack of scouts. He had only four Light Horse with him to begin with. Over the course of the morning, two scouts were sent to Washington with messages, leaving only two for scouting.