The ornamental design for a toolassembly, as shown and described.
FIG. 1 is a perspective view of a tool assembly showing my new design;
FIG. 2 is a first side view thereof;
FIG. 3 is a second side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a bottom and side perspective view thereof;
FIG. 9 is a top and side perspective view thereof; and,
FIG. 10 is third side view thereof.
The elements depicted by broken line in FIGS. 9 and 10 illustrate portions of the tool assembly in which the design is embodied that are not considered part of the claimed design.