To describe Tanzu Service Mesh object and policy configurations, such as global namespaces and access control policies, you need to create appropriate declarative manifest files and maintain the files in your Git repository. You can then use the Tanzu Service Mesh to apply manifest files to the configuration in your Tanzu Service Mesh tenant.
For more information about creating declarative manifest files, see Create a Declarative Manifest Based on a Tanzu Service Mesh API Specification and Use an Existing Object or Policy Configuration to Create a Manifest.