Use only after reading the saved recipe with show_recipe and receiving a direct request to change its ingredients or instructions. Send the full content document and its current revision. Preserve existing section and item IDs for unchanged content; omitted sections or actions are deleted. New sections and actions can omit IDs. This replaces grouped text atomically and advances the revision. Photos remain optional and are not changed by this tool. On a revision conflict, read the recipe again and reconcile the requested edit before retrying.