Are there a reason that msbuild would not import build/xxx.targets automatically from tool package in contrast from normal package?

[tny-cesilco]

Since we can install dotnet tool globally I would like to write some tool that trigger command on restore package on every project. So I have write .targets file inside build folder and pack it as a nupkg then install

But that seem to trigger if the package is install as normal package, not installed as tool

Are there any problem or concern that this was not a feature of msbuild?