Manage Harness RBAC roles, role assignments, permissions, and resource groups via MCP v2 tools. List, create, update, and delete custom roles. View role assignments and permissions for users, groups, and service accounts. Use when asked to manage access control, assign roles, check permissions, create custom roles, review RBAC configuration, onboard users, or audit access. Trigger phrases: manage roles, RBAC, role assignment, user permissions, access control, custom role, resource group, who has access, grant access, revoke access.