A screwdriver is quite different than some wire insulation or drilling swarf
When we did FOD walkdowns on the airfield not every little bit was of concern. Only things that could be picked up by an engine and do damage.
Not all FOD is equal in all situations.
That's why we need more detail about what was found to determine the seriousness.
Could it have caused a crash? Just an early landing? Or just short fuel filter life.