SGR Summary table

Agent	SGR Implementation	ReasoningTool	Tools	API Requests	Selection Mechanism
1. SGR-Agent	Structured Output	❌ Built into schema	6 basic	1	SO Union Type
2. FCAgent	❌ Absent	❌ Absent	6 basic	1	FC "required"
3. HybridSGRAgent	FC Tool enforced	✅ First step FC	7 (6 + ReasoningTool)	2	FC → FC TOP AGENT
4. OptionalSGRAgent	FC Tool optional	✅ At model’s choice	7 (6 + ReasoningTool)	1–2	FC "auto"
5. ReasoningFC_SO	FC → SO → FC auto	✅ FC enforced	7 (6 + ReasoningTool)	3	FC → SO → FC auto