get_lesson
ChatGPTRetrieve the teacher's saved activity name and prompt using only the class code. New codes have five uppercase letters/digits with no I, L, O, 0, 1, or symbols; existing six-character codes remain supported. Case, spaces, hyphens, and full-width alphanumerics are normalized. Follow the teacher's prompt for the subject, language, and activity flow; do not force English conversation practice. Send only lesson_code, never student identities, answers, or conversation text. Class Key does not receive or store the student's conversation through this tool. Returns structured lesson settings or not_found, expired, suspended, or rate_limited. Updates usage and rate-limit counters and may refresh a temporary lesson cache; does not modify lesson content, publish material, or send messages.
