I wouldn't count on them letting you keep even a bladeless tool because they have 3000 passengers to scan and don't have time to argue the nuances with anyone. If they confiscate your tool, you will not get it back, and worse, they might not let you take the cruise.
Don't usually carry much cash. I do have a SOG, already. I'm probably going to go with just some keychain tools. I do have a Rambler in my sewing kit. Think I'll see if it gets through. Leaving tomorrow, for the week in a condo, then we sail next Saturday. I'll be out of pocket, so y'all play nice.