Iu criminal pleading. Technical words necessary in an indictment for simple larceny. TOOL. The usual meaning of the word “tool” is “an instrument of manual operation ;” that is, an instrument to be used and managed by the band instead of being moved and controlled by machinery. Lovewell v. Westchester F. Ins. Co., 124 Mass. 420, 20 Am. Itep. 071.