Single tool with basic schema and description. Tool name lacks action verb (should be 'get_user_instance_basic_information'). Description is adequate (67 chars) but generic. Input schema present with types and descriptions, but output schema is not documented in visible code. No error handling guidance, no pagination, no composition with other tools. Minimal parameter validation hints.

• Rename tool to 'get_user_instance_basic_information' to start with an action verb and clarify intent.
• Document the complete output schema in code comments or JSDoc, listing all returned fields (e.g., postgres_version: string, timescaledb_version: string, instance_id: string, created_at: ISO8601).
• Enhance parameter descriptions: 'The project ID (UUID format, e.g., 550e8400-e29b-41d4-a716-446655440000)' and 'The service ID (alphanumeric, 1-50 chars)'.
• Add error handling guidance: document what happens if projectId/serviceId is not found, and suggest recovery steps (e.g., 'Call list_user_instances to discover valid IDs').
• Consider adding complementary tools (list_user_instances, get_instance_metrics) to enable richer agent workflows and reduce single-tool dependency.