TaskManager is a functional but mediocre MCP server with significant definition quality gaps. Tool naming follows verb_noun convention (add_task, list_tasks, complete_task, tasks_by_status) which is good, but descriptions are minimal and parameter documentation is incomplete. All four tools have input schemas visible, but lack constraint documentation, enums, and output schemas are not formally specified. Error handling is absent, no recovery guidance, no error classification, and no validation feedback. The resource dependency in add_task's description ('consult resource: task://priorities') is documented but the actual priority enum is not enforced in the schema itself. Overall, the server meets basic functionality but falls short of production-grade quality expected for agent usage.

• Add enum constraints to priority parameter in add_task schema: {"enum": ["low", "medium", "high", "urgent"]} (or load from priorities.json at startup).
• Add enum constraint to status parameter in tasks_by_status schema: {"enum": ["pending", "completed"]}.
• Document output schema for all tools. E.g., add_task returns {"status": "ok", "task_id": <integer>}; list_tasks returns [{"id": <int>, "title": <string>, "description": <string>, "priority": <string>, "status": <string>, "created_at": <string>}].
• Expand tool descriptions to 50 - 150 characters with explicit context. E.g., list_tasks: 'Retrieve all tasks with their titles, descriptions, priorities, and current status. Returns up to 100 tasks; use pagination to fetch more.'
• Add limit and offset parameters to list_tasks and tasks_by_status. Cap default limit at 20, max at 100. Return total_count and has_more flag to guide pagination.
• Add validation and error handling. Return HTTP 400 with message 'Invalid priority: got "critical", must be one of: low, medium, high, urgent' if priority is invalid in add_task. Return HTTP 404 with message 'Task 999 not found' in complete_task if task_id doesn't exist.
• Add format specification for created_at parameter: 'ISO 8601 datetime string, e.g. 2024-12-15T14:30:00Z'.
• Add a confirmation mechanism for complete_task: support a dry_run parameter that returns the task before marking it, or require an explicit confirmation_token from a preceding dry_run call.
• Validate task_id range. Add description: 'Task ID (integer > 0)'.