If you're a country with your own satellites, most ASAT weapons are a problem because they create debris that hinders your own operations. Countries like the US

If you're a country with your own satellites, most ASAT weapons are a problem because they create debris that hinders your own operations. Countries like the US also have their own satellites that can immediately detect terrestrial missile launches, so you don't have much in the way of plausible deniability. While the launch of your space-tug would still be tracked, it's a little bit more obfuscated since you can launch months or years before you maneuver into position. Once you're close enough to interact with a satellite, you can also visually inspect or even retrieve it, which might yield useful information.