User-Friendly
Make it easy on the person using it.
Ask when it helps: information, permissions, and commitments should normally be requested when providing them creates an understandable benefit for the user.
This can be described more formally as Just-in-Time Data: collect what is necessary when it becomes useful instead of demanding unrelated information before the person can receive value.
Necessary security, payment, legal, safety, or account information can still be requested when genuinely required.