Gets a cache policy, including the following metadata:

• The policy's identifier.

• The date and time when the policy was last modified.

To get a cache policy, you must provide the policy's identifier. If the cache policy is attached to a distribution's cache behavior, you can get the policy's identifier using ListDistributions or GetDistribution. If the cache policy is not attached to a cache behavior, you can get the identifier using ListCachePolicies.