> A food processor is a kitchen tool even though it does many things.

It does variations of the same thing.

A computer is more of a toolbox than a tool.

Isn't a food processor just what certain marketing teams call a blender?

Blending is just one of the functions of a food processor. A food processor can usually also do kneading, mincing, and slicing, or (depending on extensions) even rolling (pasta) dough and squeezing citrus fruits.