bad cli commands in ORM introduction

I read mini tutorial http://www.doctrine-project.org/docs/orm/2.0/en/reference/introduction.html#mini-tutorial and try run command "doctrine orm:schema-tool --drop"

TIP When you create new model classes or alter existing ones you can recreate the database schema with the command doctrine orm:schema-tool --drop followed by doctrine orm:schema-tool --create.

It's not worked for me:

[InvalidArgumentException]
Command "orm:schema-tool" is not defined.

But command "doctrine orm:schema-tool:drop --force" and "doctrine orm:schema-tool:create" is worked.
It's bug in documentation?