Worked on improving OAuth 2.0 token refresh reliability in the NVIDIA/NeMo-Agent-Toolkit repository by addressing a compatibility issue with MaaS OAuth servers. Implemented a targeted fix in Python to include the client_id parameter in refresh_token requests, ensuring smoother integration with various OAuth providers and reducing token renewal failures. Focused on API integration and unit testing to validate the solution and prevent future regressions. Consolidated the changes into a maintainable patch, simplifying future debugging and maintenance. The work enhanced the robustness of OAuth flows within the toolkit, supporting more reliable authentication and access token management across multiple service integrations.