What document outlines both parties' responsibilities and service provisions in cloud engagements?

The document that outlines both parties' responsibilities and service provisions in cloud engagements is typically the Service Level Agreement (SLA). An SLA specifies the expected level of service, including all relevant metrics, details about the availability and performance of the service, and the responsibilities of both the service provider and the customer. This agreement helps in ensuring that both parties have a clear understanding of their commitments, which is crucial for managing expectations and measuring service quality.

While a Master Service Agreement (MSA) also defines the overall terms of engagement between the parties, it may not specifically detail the service-related metrics and performance expectations as thoroughly as an SLA. A contract can be a broader term that encompasses various agreements, but it may not always focus on the specific service provisioning details found in an SLA. Similarly, Terms of Service outline the rules and guidelines that users must agree to in order to use a service but do not always cover the specific responsibilities of the parties involved in a cloud engagement.

Thus, the Service Level Agreement is the precise document that explicitly defines both parties' obligations and service provisions in cloud engagements, making it the most suitable answer.