Describe the bug

Attempt to install a tool that targets a framework version not present. The error message emitted complains about a missing DotNetToolSettings.xml file.

To Reproduce

dotnet tool install --global microsoft.dotnet.genapi.tool --add-source https://dnceng.pkgs.visualstudio.com/public/_packaging/dotnet9-transport/nuget/v3/index.json --prerelease

Exceptions (if any)

Error observed:

Tool 'microsoft.dotnet.genapi.tool' failed to update due to the following:
The settings file in the tool's NuGet package is invalid: Settings file 'DotnetToolSettings.xml' was not found in the package.
Tool 'microsoft.dotnet.genapi.tool' failed to install. Contact the tool author for assistance.

Further technical details

This was reproduced with a machine that didn't have net9.0 SDK installed. To fix it, you can install the SDK, or use the package from the dotnet8-transport feed instead.

The SDK should do better when installing the tool to notify the user they might need to update the SDK.