The server has 4 tools with inconsistent quality. Naming follows verb_noun convention (create_reminder, get_reminder, list_reminder_lists, delete_reminder), which is positive. However, parameter descriptions lack specificity and formatting constraints. The get_reminder tool has an inconsistency where list_name is marked optional=true but described as required. Output schemas are not formally documented, responses are returned as unstructured strings or JSON dumps rather than structured objects with typed fields. Error handling provides basic recovery guidance but lacks categorization (retryable vs fatal). Security includes AppleScript sanitization for injection prevention, which is good, but input validation is minimal. The tool composition is reasonable but could be more atomic (delete_reminder searches across lists if list_name is omitted, which couples concerns).

• Document output schemas for all tools. For get_reminder, return a structured array: [{name, body, due_date, completed}]. For list_reminder_lists, return [{list_name, reminder_count}]. For delete_reminder, return {success: bool, message, deleted_reminder_name}.
• Fix get_reminder: clarify whether list_name is required or optional. If optional, explain what happens when omitted (searches all lists? returns empty?). Sync schema and description.
• Expand tool descriptions to 150 - 250 characters. Include: what it does, when to use it (vs similar tools), and what it returns. Example: 'Retrieve reminders from a specific list. Use this to check pending tasks or fetch completed items. Returns reminder name, due date, notes, and completion status.'
• Add pagination to get_reminder: include total_count and next_cursor in response. Document limit (1 - 100) and default (20). Prevent truncated results without visibility.
• Implement confirmation step for delete_reminder: return {success: false, requires_confirmation: true, reminder_to_delete} and accept a confirm=true parameter to finalize. Prevents accidental deletions.
• Enhance error messages. Instead of 'AppleScript failed: [stderr]', return categorized errors: 'List "MyList" not found (retryable: false, available lists: [Reminders, Work, Personal])'. Enables agent self-correction.
• Add formal constraints to parameters: due_time regex pattern (^[0-2][0-9][0-5][0-9]([0-5][0-9])?$), limit bounds (min: 1, max: 100). Prevents invalid inputs.
• Consider renaming get_reminder to fetch_reminders (plural) or search_reminders. get_reminder suggests a single reminder lookup by ID, which this tool does not support. Clearer naming aligns LLM expectations.

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

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