Supplier Inquiry agent not returning payment related information

Summary:

We are working on developing a custom AI Agent - Supplier Inquiry Agent using Oracle Fusion AI Agent Studio.

As per our business requirements for Supplier Inquiry AI Agent, when Supplier inquires for a specific invoice number - he should be provided with all the information related to Invoice (Invoice number, Approval Status, Account coding Status, Supplier details, Payment number, Payment status, check date etc.) as provided in the screenshot. 

We are able to get other fields except payment related fields (payment number, check date, payment status).

We have created a business object which fetches invoice details like Supplier name, address, invoice approval status etc. using