Change one Pulse item's state. Every action changes the queue for the WHOLE workspace — an item belongs to the workspace, not to whoever called the tool, so dismissing a recommendation hides it from every member and records who decided that. acknowledge closes an attention item as seen, with no reason and no note — it is the only hand-close an automatic item accepts. resolve closes with a resolutionCode and is refused for an automatic item. Both need the permission for the item's source (manage_broadcasts for a broadcast, manage_automation for a flow, sequence or operation), and a critical item that is not manual by policy can be closed only by an owner or admin (a workspace key counts as owner); resolve on such an item also needs a note. Closing a card does not fix its cause, and it hides the problem: an item closed by hand is NOT raised again for 14 days, even while its detector still observes the condition. Only an anomaly the platform closed itself (resolutionCode source_condition_cleared) reopens at once when the condition returns. A dismissed recommendation returns by itself after the same cooldown. Does not apply a recommendation's proposed change — that is a dashboard action.