When you run a Cobra (Golang CLI) application, it will print out nicely-formatted usage information derived from the root command. However it is up to you to print out subsequent usage information for commands underneath and their subcommands.
$ go run main.go
Various functionality for doing things from the CLI.
Usage:
your-binary [command]
Available Commands:
...By accessing fields in the command and the sub-commands you can print similar usage information as the root command.
$ go run main.go exp
Testing various functionality for this application.
Usage:
your-binary test [subcommand]
Available Subcommands:
delete Delete a test
release Release a test