A cloud discovery policy is a security rule used to detect and flag cloud services or SaaS applications that are unfamiliar, unsanctioned, or unusually risky. It works by comparing observed app usage, domains, identities, and activity patterns against approved lists and risk signals, then generating alerts when something new or suspicious appears.
In cyber security, this matters because cloud use can expand faster than the security team can manually review it. Shadow AI tools, personal file-sharing apps, or newly adopted SaaS services may expose corporate data or bypass normal controls. Discovery policies help defenders spot that activity early, investigate whether it is legitimate, and apply follow-up controls such as access review, DLP rules, or app blocking. Attackers also benefit from cloud sprawl, so these policies are a practical way to reduce blind spots and separate routine adoption from true risk.