$ cd tags

# Print help for `zk tag`.
$ zk tag --help
>Usage: zk tag <command>
>
>Manage the note tags.
>
>Commands:
>  tag list    List all the note tags.
>
>Flags:
>  -h, --help                 Show context-sensitive help.
>      --notebook-dir=PATH    Turn off notebook auto-discovery and set manually
>                             the notebook where commands are run.
>  -W, --working-dir=PATH     Run as if zk was started in <PATH> instead of the
>                             current working directory.
>      --no-input             Never prompt or ask for confirmation.

# The default command is `tag list`.
$ zk tag
>biography (1)
>biology (2)
>book (12)
>dystopia (2)
>feminism (1)
>fiction (6)
>history (2)
>non-fiction (6)
>philosophy (3)
>physics (1)
>romance (3)
>science (3)
>science-fiction (1)
2>
2>Found 13 tags