Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (one parameter, no output schema, annotations present), the description is mostly complete. It could benefit from noting that deletion is permanent and what happens if a non-draft/scheduled broadcast is targeted (error message or no-op), but the current description covers the primary constraint. Minor gap, so 4.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.