I must be in a parallel universe. What do you want maintenance people to do? Fix the aircraft with a plastic tool-kit from Lego?
I know this comes as a shock to many people who apparently work in the aviation industry, but aircraft need maintaning and repairing.
maintenance staff have a responsibility to make sure they remove all tools when they leave, they, and those around them all have airside passes.
maintenance staff get searched just like everyone else, they just happen to be allowed to bring in tools through certain security gates in vehicles, i.e. not the passenger terminal security routes.
Why do air crew seem to take being searched as such a major hassle/insult? All other airline and airport staff have to do it far more frequently.