The ornamental design for a controller of tool, as shown and described.
FIG. 1 is a perspective view of a controller of tool showing my new Design, the broken line drawing of the controller of tool is for illustrative purposes only and forms no part of the claimed design;
FIG. 2 is a front view thereof, the broken line drawing of the controller of tool is for illustrative purposes only and forms no part of the claimed design;
FIG. 3 is a rear view thereof, the broken line drawing of the controller of tool is for illustrative purposes only and forms no part of the claimed design;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof, the broken line drawing of the controller of tool is for illustrative purposes only and forms no part of the claimed design;
FIG. 6 is a top view thereof, the broken line drawing of the controller of tool is for illustrative purposes only and forms no part of the claimed design; and,
FIG. 7 is a bottom view thereof, the broken line drawing of the controller of tool is for illustrative purposes only and forms no part of the claimed design.