Start with the part that is verifiable
Separate the event you can describe from the motive or reaction you are guessing. For a message about how to decline work outside your agreed role, use this factual base: describe the request or behavior, its frequency, and the effect on delivery, health, or privacy.
Make one answerable request
Give the recipient one concrete question or next step instead of several emotional jobs at once. Propose a workable channel, schedule, scope, or escalation route and document the agreement. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Leave the recipient in control
Do not retaliate, shame a colleague, or refuse essential duties without explaining the operational alternative. Use HR, a representative, occupational health, security, or legal support for harassment, discrimination, threats, or unsafe work. A clear message remains useful even when the answer is no or no answer arrives.