listComments reads card comment actions in reverse chronological order.
automations/list-trello-comments.automation.ts
card accepts an ID, short link, or URL. limit is 1–1,000 and defaults to 100; before and since accept Trello comment action IDs as pagination cursors. Optional account defaults to the project binding.
Returns Signal<TrelloComment[]>; each result has id, text, commentedAt, and nullable creator profile. The action returns one provider page.