Hi there, I believe that if you don't want to give too many details at least to provide something to let people guide on. Otherwise you sound more fishy than catchy, like those pyramidal scams.
I recommend reading this thread explaining how to actually pitch a collaboration. https://forums.tapas.io/t/before-submitting-your-collaboration-request/41606
It's totally fine to don't want to give details about your story, plot or characters, but at least the fundamental parts of the job should be explained, at least try to provide number of panels per episode or number of episodes even, or at least if it is a paid or unpaid gig
