The purpose of this paper is to test the impact of tolerance of ambiguity of managers on the relation between environmental uncertainty and the overall usefulness of MAS information. Previous research indicates that the personality of individuals affects their perceptions and responses to contextual uncertainty (Ashford and Cummings, 1985; Bennett et al., 1990). In particular, the tolerance of ambiguity literature suggests that individuals differ in how they respond to uncertain circumstances (Budner, 1962; Ashford and Cummings, 1985). The cognitive style of individuals is expected to moderate the relationship between perceived environmental uncertainty and the usefulness of MAS information.