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Cancel pending deliveries. Ask the user before cancelling their post. Published posts remain in history.

Workflow

Access and behavior

Write or Administrator OAuth consent and a member/administrator team role are required. Tools are listed and callable only when the current grant and role permit them. Cancellation stops pending deliveries. It does not remove provider-side publications, and a group with work already preparing or publishing cannot be cancelled safely.
Confirm the exact target and consequence with the user before calling this tool.

Arguments

Example call

The client initializes the MCP connection before sending this JSON-RPC call. Example records are fictional.

Example result

Posted returns this object in structuredContent and a JSON text content block. A tool failure sets isError; never treat an error as a completed mutation.
HTTP operation · Connect an MCP client · Request conventions