List all Trello boards you can access. Returns compact {id, name, shortLink, url} — use this instead of dumping full board JSON.

List the custom fields defined on a board, including the allowed options for list-type fields. Use this to discover field names and values before calling find_cards.

Find cards on a board, optionally filtered by a custom field value, list name, and/or label. This is the main tool: e.g. fieldName='AI Ready', value='Claude kiosk'. Use values to match ANY of several values at once, e.g. ['Claude kiosk','Claude Module'] to pull the whole queue, or ['Need response'] to see what's waiting on a human. Matching is case-insensitive (exact first, then substring). Omit value/values to match cards where the field is simply set.

Get the full content of one card: description, custom field values, checklists, attachments, comments, members, due date.

Post a comment to a card (useful for asking a clarifying question or logging progress while solving a task).

Set (or clear) a custom field on a card — e.g. mark a task done by setting AI Ready to 'Done'. For list-type fields the value is matched to an existing option; pass createOption:true to add a new option. Leave value empty to clear the field.