[kozhevnikov]

It should be a simple robots.txt setting (i.e. indexed but without snippets) available to any publisher and content creator in any country.

[zmix]

It is already. And in addition to that, since 'robots.txt' is being considered to broad and too 'out of time', Google offers meta tags, that their bot evaluates. They did this long time before the EU direction.

[dahauns]

But there already is? That's exactly what the

  nosnippet

meta-tag is for.