If you don't see your command in the response list then it is not well formed or just does not have description. So you need to investigate your rake file. Rake tasks files have similar structure, like:
namespace :some_task do
task :do_some_work => :environment do
# Code goes here
end
desc 'Do some other work'
task :do_something => :environment do
# Code goes here
end
end
#first task
rake some_task:do_some_work
#second task
rake some_task:do_something
Sometimes there could be no namespace and then tasks could be executed just using rake command and name of the task as first argument.
