To start a tool, for example the version tool directly, you need to run:

docker run --rm \
  coremedia/management-tools \
  tools/bin/cm version

Here the tool and its arguments are passed to the entrypoint. Because the default working directory is set to /coremedia by the image, you only need to pass the relative path to the cm executable. All arguments that follow will be handled as arguments to the cm executable. The results of the tools are written to stdout and can easily be processed using standard shell means.

Parse an IOR URL. 

docker run --rm \
  coremedia/management-tools \
  tools/bin/cm ior <ior string>