What would happen to a set of metal tools left outdoors in the rain for a long time?

If a set of metal tools is left outdoors in the rain for an extended period, they would likely develop rust due to the oxidation of iron in the metal when exposed to moisture and oxygen. The rust would weaken the structural integrity of the tools, making them less effective and potentially unusable. Additionally, prolonged exposure to moisture could lead to other forms of corrosion, depending on the type of metal and any protective coatings present. Regular maintenance and proper storage are essential to prevent such damage.