One of the better-known categories heavily used in cloud security is Federated Identity Brokers. These services help intermediate IAM between an organization's existing identity providers(internal Security Guidance v4.0 Copyright2017. Cloud Security Alliance. All rights reserved or cloud-hosted directories) and the many different cloud services used by the organization. They can provide web-based Single Sign
0n(SS0). helping ease some of the complexity of connecting to a wide range of external services that use different federation configurations.
Reference: CSA Security Guidelines V.4(reproduced here for the educational purpose)

Risk tolerance is the amount of risk that the leadership and stakeholders of an organization are willing to accept. It varies based on asset and you shouldn't make a blanket risk decision about a particular provider; rather, assessments should align with the value and requirements of the assets Ref: Security Guidance v4.0 Copyright2017, Cloud Security Alliance(used for educational purpose here)