Which is important but not taking an action.

> and saying the action is going to be watch for a repeat

That watching was already happening. Keeping the status quo of watching is below the level of meaningful action here.

> if there is one in a short-ish amount of time, then you'll move to mitigation.

And that would be an action, but it would be a response to the repeat.

> I'd be a lot happier hearing someone say this instead of a blanket 'nothing'.

They did say roughly those things, worded in a different way. It's not like they planned to say "nothing" and then walk out without elaborating!