You can find more information about each command that you can use in TD Toolbelt by reading the man pages.
Running td help:all shows the commands available in Treasure Data:
$ td help:all database:list # Show list of tables in a database database:show <db> # Describe a information of a database database:create <db> # Create a database database:delete <db> # Delete a database ....
If you want more information about individual commands, you can run td help <command>:<subcommand>:
$ td help table:list
usage:
$ td table:list [db]
example:
$ td table:list
$ td table:list example_db
$ td tables
description:
Show list of tables
options:
-n, --num_threads VAL number of threads to get list in parallel
--show-bytes show estimated table size in bytes