It doesnt work that way. The Capitals who have Sammy under contract have a specific protocol to be followed to request permission to play in an event like that. He has an agent that knows these rules and the Caps have lawyers that will remind him of these rules. These rules there so that things are done the right way. So that, the player doesn't look like a fool and the team look incompetent and so that the NHLPA doesn't have a fit. Samsonov has run afoul of these kinds of things before and by now you would think he would be taking them by the numbers. Its like he has learned nothing. And....now the media is going to have a mess of questions and create the chance for other stuff to go wrong. Its not that hard. If his agent jumped then gun on the announcement, you fire him.
Not sure you even know for sure that he announced he was going over then the Caps said no. Where is that written in the tweet? What I see is Sammy telling the Russian reporter he was disappointed he couldn't go, but nothing about him saying he was going then the Caps saying "not so fast". ITs entirely possible from what I'm reading that he asked them properly, they said no, and he told the reporter he was upset because he wanted to go... you may be making up issues out of thin cloth.