class ToolClass2(object):
"""Implementation for PPPpoint_addin.tool (Tool)"""
def __init__(self):
    self.enabled = True
    self.shape = "NONE" # Can set to "Line", "Circle" or "Rectangle" for interactive shape drawing and to activate the onLine/Polygon/Circle event sinks.
def onMouseDownMap(self, x, y, button, shift):
    fc = r"C:Testpourpoint.shp"

    pt = arcpy.Point()
    pt.X = float(x)
    pt.Y = float(y)

    ptGeoms = [arcpy.PointGeometry(pt)]
    cursor = arcpy.da.InsertCursor(fc, ['SHAPE@'])
    cursor.insertRow([pt])
    del cursor