Worked on the RedHatInsights/insights-host-inventory repository to enhance tag query input validation, focusing on backend reliability and API clarity. Addressed a bug by enforcing that only a single ID parameter can be provided when querying tags, which reduced ambiguous requests and prevented invalid tag queries. The solution involved updating validation logic and converting conflicting ID parameter tests into unit tests, thereby improving test coverage and feedback speed. Utilized Python for backend development and testing, ensuring more predictable production behavior and lowering support overhead. This work contributed to a more robust API experience for developers interacting with tag-related endpoints.