A test platform should remove repetitive work, not centralise every decision behind a specialist team.
The warning sign is easy to spot: product engineers need platform-owner intervention to create a test environment, understand a failure, or make a small change to a common workflow. The platform may be powerful, but it has increased cognitive load and slowed the organisation down.
Make the safe path self-service
Good platforms provide useful defaults, clear escape hatches, observable failures, and documentation that makes ownership visible. They expose stable interfaces rather than a queue of bespoke requests. The platform team still sets direction and evolves the foundations; it should not become a permanent dependency in the delivery path.
That principle applies to tests, environments, developer tooling, and agent capabilities alike: enable teams to move safely without forcing them to become experts in the platform underneath.