Server has 7 tools with basic descriptions and parameter schemas, but significant quality gaps prevent production use. All tools have descriptions (good), but most are under 100 chars and lack actionable context. Parameter schemas exist but use string types for everything (dates, booleans, numbers), forcing LLMs to guess formats. No output schemas documented. Error handling returns raw exception strings instead of recovery guidance. No tool annotations (readOnlyHint/destructiveHint). Parameter descriptions are minimal, e.g., 'Duration in minutes (defaults to 30)' lacks range constraints. No idempotency guarantees or confirmation patterns for destructive operations (cancel_meeting). Tool composition is reasonable (7 focused tools), but parameter naming inconsistencies (working_hours_only as string vs boolean) and missing enum constraints invite hallucination.

• Convert all numeric parameters (duration_minutes, max_results, days_ahead) to integer type with min/max constraints in schema. E.g., 'duration_minutes': {'type': 'integer', 'minimum': 1, 'maximum': 480, 'description': 'Duration in minutes (1 - 480, defaults to 30)'}.
• Convert boolean parameters (working_hours_only, notify_attendees, add_meet_link) to boolean type instead of string. Update descriptions to clarify true/false behavior.
• Document output schemas for each tool. E.g., schedule_meeting returns {'event_id': string, 'start_time': ISO8601, 'meet_link': string, 'html_link': string}. Include in tool docstring or separate schema file.
• Replace raw exception strings with structured error messages. E.g., 'Calendar service not authenticated. Run auth_setup.py first.' for auth errors; 'Invalid date format: expected YYYY-MM-DD, got {input}' for validation errors.
• Add tool annotations: @mcp.tool(readOnlyHint=True) for check_availability, list_upcoming_events, get_event_details, find_free_slots; @mcp.tool(destructiveHint=True) for cancel_meeting; @mcp.tool(idempotentHint=True) for schedule_meeting (if idempotent via event_id).

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry