Has an understanding of the Agile/Lean concept of “maximizing the work not done”. I.e. building working increments just enough to deliver a minimum viable product (MVP) and get feedback, keeping design simple, deprioritizing features that do not provide value to the end user, are duplicates or add a lot of cost to the product, etc.
Feels comfortable to challenge and say “no” to stakeholder feature requests that are not aligned with overall product goals/objectives, and communicate accordingly.