Jan Huege enhanced the reliability of tool orchestration in the quarkiverse/quarkus-langchain4j repository by addressing hallucinated tool calls from the Ollama chat model. He implemented validation and filtering mechanisms in Java to ensure only valid tool invocations were processed, reducing the risk of erroneous executions. Jan also developed comprehensive tests to cover hallucinated tool call scenarios and refined response handling to strictly validate tool specifications. His work leveraged skills in API integration, LLM integration, and test-driven development, resulting in safer model-to-tool interactions and improved maintainability. The depth of his contributions strengthened both reliability and user trust in the integration.