External REST - Issue in Passing OAuth2 Access Token Between Tools in Oracle AI Agent Studio

Summary: Issue in Passing OAuth2 Access Token Between Tools in Oracle AI Agent Studio (401 Unauthorised)

Description:

I am working on integrating the LSEG (formerly GIACT) Bank Account Verification API using Oracle AI Agent Studio, where the workflow involves two tools chained together:

1. Tool 1 – LSEG_GET_TOKEN_FINAL
   • Generates the OAuth2 access token using client credentials.
   • API Endpoint: /verificationservices/web_api/authenticate
   • Response successfully returns an access token (status 200).
2. Tool 2 – LSEG_VALIDATE_BANK_FINAL
   • Validates a bank account using the LSEG endpoint /VerificationServices/web_api/inquiries_v5_9.
   • Authorization: Bearer <access_token>
   • The access token should be passed dynamically from Tool 1’s output.