CHAT_STORE External REST Tool Entering Loop in Fusion

Description:

I have created an External REST tool (CHAT_STORE) in Oracle Fusion to store USER chat history with AI Agent(OOTB/Custom Agent(RAG)) in an ATP database.

Issue:
At times, the tool enters a continuous loop and keeps invoking repeatedly, which results in:

• Duplicate chat records in ATP DB
• Same payload being stored multiple times
• Endless tool execution

I have tried modifying the agent prompt and tool description, but the issue still persists.

Expected Behavior:
The tool should be invoked only once per request-response cycle.

Request:
Please help identify the root cause and suggest a way to prevent repeated/recursive tool invocation.