Is your feature request related to a problem? Please describe.

As a llm chat client, it shoud show a prompt dialog or toast to ask for permit when a mcptool would be invoked.

Describe the solution you'd like
Add new property, type: Func<bool>, name :PermitPredict to McpClientTool.

InvokeMethodAsync()
{
   ...
    if(PermitPredict!=null && PermitPredict.Invoke())
    {
      //execute...
    }
    else
    {
       //cancel
    }
   ...
}