Will this get my account banned?
That is what the limits are for. Every kind of action has its own hourly and daily ceiling set by how established the account is, the same person cannot be touched twice inside about 36 hours, the engine pauses itself when its actions bunch up, gaps are randomised, and nothing runs during your quiet hours. Hitting a limit stops the work rather than pushing through it.
Which platforms actually work?
Instagram is the fullest: content, video, carousels, campaigns and the message inbox. LinkedIn does content and campaigns, takes one image per post, has no video, and answers comment triggers with a public reply because it only allows messages between people who are already connected. Facebook posts and replies to comments, and has no outreach or lead screening at all.
Do I have to write the posts?
It writes and makes them: images from a description or from your own reference photos, short video, captions and carousels. What it does not do is quietly fill a month of calendar by itself. Posts are made one at a time, by you or by asking your agent for them, and each one is scheduled or published deliberately.
Can I pick exactly who it contacts?
Not by pasting in a list, and that is deliberate. You steer it by describing your ideal customer, by the hashtags or keywords a campaign searches, and by saving the accounts whose followers you want to reach. The campaign finds people that way and scores each one before anything is sent.
What happens when someone replies?
Instagram messages sync into an inbox with unread threads and real timestamps, where you either write the reply yourself or generate one and send it. Replies count against the same daily limits as everything else, so answering people never quietly blows the account's budget.