We claim the ornamental design for a garden tool, as shown and described.
FIG. 1 is a front elevation view of an embodiment of the claimed design;
FIG. 2 is a left side view of the claimed design of FIG. 1;
FIG. 3 is a rear elevation view of the claimed design of FIG. 1;
FIG. 4 is a right side view of the claimed design of FIG. 1;
FIG. 5 is a top view of the claimed design of FIG. 1;
FIG. 6 is a bottom view of the claimed design of FIG. 1;
FIG. 7 is a front perspective view of the claimed design of FIG. 1; and,
FIG. 8 is a rear perspective view of the claimed design of FIG. 1.
The broken lines formed by equal length dashes represent unclaimed portions of the design. The broken lines formed by unequal length dashes (i.e. dash-dot) show boundaries between the claim and unclaimed portions of the design.