As shown at the beginning of this section, the command seqtk seq generates
a help message for the seq command. tool_init can take that help message and
stick it right in the generated tool file using the help_from_command option.
Generally command help messages aren't exactly appropriate for tools since they mention argument names and simillar details that are abstracted away by the tool - but they can be an excellent place to start.
The following Planemo's tool_init call has been enhanced to use --help_from_command.