descriptionRegex

The snapshot description that can trigger the policy. The description pattern is specified using a regular expression. The policy runs only if a snapshot with a description that matches the specified pattern is shared with your account.

For example, specifying ^.*Created for policy: policy-1234567890abcdef0.*$ configures the policy to run only if snapshots created by policy policy-1234567890abcdef0 are shared with your account.