Single tool with clear naming (get_current_datetime) and complete input schema (empty object, correct for no-parameter tool). Description is adequate (95 chars, within 10-1024 range) but lacks context on WHEN to use it or what downstream tools might need. Tool annotations present (readOnlyHint, idempotentHint, destructiveHint, openWorldHint) which is good. Output schema is NOT documented, LLMs cannot see what fields to expect (iso8601, date, time, day_of_week, timezone, etc.). No parameter descriptions needed (zero params), but output structure should be declared in tool definition or description. Error handling is minimal, no guidance on failure modes or recovery.

• Add explicit output schema to tool definition: document that result contains {iso8601: string, date: string, time: string, day_of_week: string, timezone: string, timezone_abbreviation: string, utc_offset_seconds: number, utc_offset: string, unix_timestamp: number}.
• Expand description to 150-200 chars explaining use cases: 'Get the user's current local date, time, and timezone. Returns ISO 8601, human-readable formats, and Unix timestamp. Use for scheduling, timezone-aware operations, or timestamp generation.'
• Add error handling for system time unavailability or timezone lookup failures with actionable recovery guidance.
• Consider adding optional parameters for timezone override (e.g., get_current_datetime(timezone='America/New_York')) to support multi-timezone scenarios without requiring separate tool calls.
• Document that this tool is idempotent and read-only (already in annotations, but reinforce in description).