The command listing should follow the style guide that we came up with: http://softlayer-python.readthedocs.org/en/latest/dev/cli.html#defining-a-module

E.G.: The second column should start 2 spaces after the longest command name. The list should be alphabetized. Capitalize the first letter of the description text.

For groupings of snapshot commands vs normal iscsi commands, you could use snapshot as a prefix for the command. Alternatively, you could divide up the command listing into a iSCSI target section and snapshot section similar to how the root help block (`sl --help`) divides modules into categories.