12 tools with basic schemas and descriptions, but significant gaps in parameter documentation, output schema clarity, and error handling guidance. Most tools lack descriptions of what they return and when to use them vs. alternatives. Parameters are minimally described (e.g., 'The assignment ID' with no format/constraint info). No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear risk levels. Error responses appear to return raw exceptions rather than actionable recovery guidance. Naming is verb-first and generally clear, but composition issues exist: solve_assignment and generate_document both produce content but serve different purposes without clear distinction in descriptions.

• Add explicit output schemas to all tools. E.g., list_assignments should document: 'Returns list of {id: string, title: string, course: string, due_date: ISO8601, status: string}'. Use JSON Schema format in docstrings.
• Implement tool annotations: add @tool(readOnlyHint=true) to list_assignments, get_assignment, classify_assignment, get_submission_status, check_submission_open; add @tool(destructiveHint=true) to upload_submission, submit_assignment; add @tool(idempotentHint=true) to login if it is safe to retry.
• Convert free-form string parameters to enums. E.g., generate_document fmt param should be enum ['docx', 'pdf']. Add min/max constraints to numeric params and length limits to string params in descriptions.
• Replace raw exception returns with structured error responses. E.g., 'Assignment not found (ID: {assignment_id}). Call list_assignments() to see available assignments.' Include error category: retryable, user_fixable, or fatal.
• Remove username and password from login() parameters. Use environment variables (LMS_USERNAME, LMS_PASSWORD) exclusively. If interactive login is needed, implement a separate tool that returns a session token via secure channel, not via parameters.