CLI command "help <command>" doesn't display help for the given command, but rather general help file.

jboss-datagrid-7.0.0-server/bin/ispn-cli.sh
[disconnected /] help get
Usage:

jboss-cli.sh/jboss-cli.bat [--help] [--version] [--controller=host:port]
[--connect] [--file=file_path]
...

Expected output:
SYNOPSIS
get [--codec=codec] [ cache. ] key

DESCRIPTION
Retrieves the value associated with the specified key from a cache.
...

Note: This works in library mode.