You are collaborating on a model prototype with your team. You need to create a Vertex AI Workbench environment for the members of your team and also limit access to other employees in your project…

Granting the `Notebook Viewer` role to a service account provides read-only access to Vertex AI Workbench notebooks and instances, which is appropriate for team collaboration on a prototype and aligns with the principle of least privilege to limit access to other employees.

Granting the `Vertex AI User` role to the default Compute Engine service account provides overly broad permissions to a widely used account, which contradicts the goal of limiting access.

Granting the `Vertex AI User` role to a new service account provides broader management permissions for Vertex AI resources, exceeding the requirement for simply viewing and interacting with a Workbench environment.

Granting the `Vertex AI User` role to an individual team member does not facilitate shared environment access management for the team and doesn't explicitly address limiting access for other employees effectively.