In the additional arguments fields for cov-build, cov-analyze, cov-commit, etc., Jenkins build variables are not able to be used. I tried to add the following to additional cov-commit-defects arguments:

--strip-path "${WORKSPACE}" --target x86 --description "from Jenkins"

and the variable is not replaced with the workspace, it actually tried to strip the path of '${WORKSPACE}' which is obviously not what you want to do.