Let's add an actual example.  So maybe:

    # local:characterize -f PARAMFILE
    #
    # Characterize will inspect your input data, inferring a schema and 
    #    generating keys, if needed. It will output CSV containing various
    #    statistics about your data (most common values, percent null, etc.)
    #
    # Where PARAMFILE is a file with the following parameters:
    #   LOADER=<full class path of loader function>
    #   INPUT_SRC=<Location of the input data>
    #   OUTPUT_PATH=<Relative path from project root for output>
    #
    # Example PARAMFILE:
    # LOADER=<real loader path>
    # INPUT_SRC=<real input data path - probably to twitter example file>
    # OUTPUT_PATH=<real example output>
    #
    # Type inference is performed by default, but it may slow down
    #   characterization.  To turn it off add the parameter X ... <I don't know how to turn it off. :)>