Canvas MCP Server

# Canvas MCP TODO ## High Priority <!-- Add high priority items here --> --- ## Medium Priority <!-- Add future items here --> --- ## Low Priority <!-- Add future items here --> --- ## Completed - **2026-01-25**: Added `update_assignment` tool - PUT /api/v1/courses/:course_id/assignments/:id - Parameters: course_identifier, assignment_id, name, description, submission_types, due_at, unlock_at, lock_at, points_possible, grading_type, published, assignment_group_id, peer_reviews, automatic_peer_reviews, allowed_extensions