Write from facts rather than momentum
Pause long enough to remove accusations, assumptions, and details that belong to someone else. For a message about how to tell a coworker you will not discuss gossip, use this factual base: describe the request or behavior, its frequency, and the effect on delivery, health, or privacy.
Offer a proportionate next step
Match the size of the request to the relationship and to what the recipient can reasonably decide now. 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.
Protect privacy on both sides
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. Use the most private legitimate channel available and do not share the exchange to recruit support or pressure.