Build the judgement before the automation.
A channel is an account, a public identity and a set of permissions. Getting the identity right early is cheaper than a rename after a thousand subscribers, because your handle appears in every link anyone has ever shared.
Choose a handle that survives a change of topic. Names built around one trend, one year or one job title become a cage the moment your interests move, and the people who find you later will not know what the old name meant.
Your description is read by two audiences: a person deciding whether to subscribe, and a search system deciding what you are about. Write the first sentence for the person, and make sure it contains the words the second one needs.
Two-factor authentication is not optional for a channel that may one day earn money. Channel takeovers happen to small creators precisely because their security is weaker, and recovery is slow, uncertain and entirely out of your hands.
AI is useful here for generating and stress-testing options — handle variations, description drafts, keyword lists. It cannot tell you whether a name is already taken, trademarked or unfortunate in another language. That is your job, with a search engine and, ideally, a native speaker.