This tool is extracted from package Additional_Tools_for_Xcode_12.5.dmg
with sha256sum
46f09b2ccd55bb6e47020438f5ad73ab5775d199935a2da0ad5001316a4da99f
and is used by
wikit to create dictionary for macos.
If you want to know more about its usage, please refer Dictionary Services Programming Guide for detail.