Update a card/note in Anki. Supports 4 operations: (1) 'answer': mark a card as reviewed with ease 1-4, (2) 'update_note': update note fields, tags, and media, (3) 'update_fields': update only fields and media, (4) 'update_tags': update only tags. Returns success message with operation details.

Create a new flashcard in Anki. Requires: deckName (exact deck name), modelName (note type like 'Basic' or 'Cloze'), and fields object matching the note type's field names. Returns card ID on success. FORMATTING: Use HTML only (NO markdown) - for line breaks, for bold, for italic, / for lists. Media files (audio/picture) support URLs or local absolute paths.

Retrieve cards that are due for review. Returns JSON object with 'count' (number of cards) and 'cards' array. Each card includes: cardId (number), question (HTML cleaned string), answer (HTML cleaned string), due (Unix timestamp). Ordered by due date (earliest first).

Retrieve new unseen cards that haven't been studied yet. Returns JSON object with 'count' (number of cards) and 'cards' array. Each card includes: cardId (number), question (HTML cleaned string), answer (HTML cleaned string), due (Unix timestamp). Ordered by card position in new queue.

Retrieve detailed card/note information. Provide EITHER cardId OR query (not both). Returns array of card objects with: cardId, deckName, modelName, question, answer, fields (object with all field values), due, interval, ease, reps, lapses, type, queue, noteId. Use this to find card/note IDs for update operations or to inspect card details.

Create multiple flashcards in one operation. Each card has same structure as add_card tool. Returns JSON with 'successful' (count), 'failed' (count), and 'errors' array (details of failures if any). More efficient than calling add_card multiple times. Use HTML formatting (not markdown). Processes cards sequentially; partial success possible (some cards created, some failed).