Write a UX Microcopy for Any Interface

Write UX microcopy for the following interface elements in [APP / PRODUCT NAME], a [BRIEF DESCRIPTION] for [TARGET USERS].

For each element, provide the copy and a one-sentence rationale. Elements needed:

1) Onboarding tooltip for [FEATURE]
2) Empty state message when [SCENARIO]
3) Confirmation dialog before [DESTRUCTIVE ACTION]
4) Success notification after [USER ACTION]
5) Form field placeholder text and error message for [FIELD TYPE]
6) Loading state message for [PROCESS]. Rules: be human and clear, avoid technical language, match the tone [TONE: e.g. friendly / professional / playful], keep each piece of copy under 15 words where possible