A tool in volleyball happens when a hitter uses the block. The hitter strikes the ball off the blocker’s hands. The ball then goes out of bounds.
This scores a point. Tools reward smart shot selection. Therefore, vision and timing matter. Hitters aim for the outside hands. Blockers try to pull away.
For example, a tight block forms. The hitter swings high and wide. The ball clips the blocker fingers. It flies out. The referee awards the point. That attack scores by tool.