Pretty much all the basic tools are named after and have icons looking like the original, physical tools used back in the analog days of photography, and also painting and printing in general.

Brush, pen and scissors being the obvious ones, masking should also be fairly self-explanatory. But then there’s also stuff like dodging and burning, which is a technique used in the darkroom to increase or decrease exposure of specific parts of the physical image, and a lot more I have to look up the english names for first