A tip I picked up a long time ago and use while we are talking wood toolboxes!
A really good thing about wood tool boxes compared to metal toolboxes (if left in unheated storage) is less condensation on the tools especially if you put camphor tablets inside. Camphor produces fumes that form a coating on the tools that prevents rust. Keep the camphor in small pill bottles. Drill a number of small holes in the bottle lids to permit the fumes to escape and protect the contents of the drawer. It really does work, and keeps insects away too.