Moodler MCP has solid naming conventions (verb_noun pattern, clear action verbs) and comprehensive descriptions for most tools. However, schema documentation is incomplete, input schemas are visible but output schemas are not documented in the provided code. Parameter descriptions are present but some lack detail on constraints and formats. Error handling exists but recovery guidance is minimal. The server demonstrates good composition (single-responsibility tools) and proper parameter typing, placing it in the 'Fair' range with noticeable gaps.

• Document output schemas for all tools. Specify field names, types, and whether arrays are paginated. Example: 'Returns {events: [{id, title, date, course_id}], total_count, has_more}'.
• Add explicit parameter constraints: get_calendar should validate year (1900-2100) and month (1-12); get_upcoming_deadlines should document default limit and min/max bounds.
• Enhance error messages with recovery steps. When 'not signed in' is detected, return: 'Not signed in. Call login_to_moodle to authenticate via SSO, then retry.'
• Implement pagination for list-returning tools. Add offset/limit or cursor parameters and return total_count so LLMs can fetch large result sets incrementally.
• Add tool annotations to server.py registration. Mark login_to_moodle and clear_cache with destructiveHint=true; mark all get_* tools with readOnlyHint=true for LLM safety reasoning.