In this paper, we describe our work in the design and evaluation of a tool, the Shared Data Manager, to be used to enable automatic data sharing capabilities for municipal government applications. In an earlier study, we determined that municipal government employees rely heavily on manual methods for data sharing, which is time-consuming and error-prone. We describe in detail our findings from a two-week evaluation of the Shared Data Manager system with municipal employees. Overall, municipal employees found the tool to be useful for sharing data between departments and customizing data sharing access controls. © 2012 IEEE.