Centralize the definition of MCP Server and Tool names into Constants class (#7168)

Author: jebriede

src/NuGet.Clients/NuGet.PackageManagement.VisualStudio/McpServerConstants.cs

@@ -0,0 +1,17 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace NuGet.PackageManagement.VisualStudio
+{
+    public static class McpServerConstants
+    {
+        // This value must match the server name registered in mcp.json. Keep both in sync.
+        public const string NuGetMcpServerName = "nuget";
+
+        // Tool names below must match their respective tool names defined in the NuGet MCP Server.
+        public const string NuGetSolverToolName = "get-nuget-solver";
+
+        // Fully qualified tool names are in the format of "{serverName}_{toolName}".
+        public const string NuGetSolverFullyQualifiedToolName = $"{NuGetMcpServerName}_{NuGetSolverToolName}";
+    }
+}

src/NuGet.Clients/NuGet.Tools/FixVulnerablitiesService.cs

@@ -27,8 +27,6 @@ internal class FixVulnerablitiesService : IFixVulnerabilitiesService
         private const string AgentModeResponderServiceMoniker = "Microsoft.VisualStudio.Copilot.AgentModeResponder";
         private const string AuthStatusDetermined = "c936efcc-6baa-4ad3-9c2b-7ba750acf18f";
         private const string ServiceName = "Microsoft.VisualStudio.Copilot.SolutionContextProvider";
-        private const string NuGetMCPServerName = "nuget";
-        private const string NuGetSolverToolName = "get-nuget-solver";
 
         private static readonly Guid CopilotReadyUIContext = new(AuthStatusDetermined);
         private static readonly ServiceRpcDescriptor ProviderDescriptor = CopilotDescriptors.CreateContextProviderDescriptor(ServiceName);
@@ -101,7 +99,7 @@ public async Task LaunchFixVulnerabilitiesAsync(CancellationToken cancellationTo
                     string solutionPathContext = $"The current solution file path is: {GetSolutionPath()}.";
                     CopilotContext context = new CopilotContext(ProviderDescriptor.Moniker, ContextDescriptor, request.CorrelationId, solutionPathContext);
                     IReadOnlyList<CopilotFunctionDescriptor> functions = await cfp.GetFunctionsAsync(request.CorrelationId, cancellationToken);
-                    if (functions is null || !functions.Any(f => string.Equals(f.Name, $"{NuGetMCPServerName}_{NuGetSolverToolName}", StringComparison.OrdinalIgnoreCase)))
+                    if (functions is null || !functions.Any(f => string.Equals(f.Name, McpServerConstants.NuGetSolverFullyQualifiedToolName, StringComparison.OrdinalIgnoreCase)))
                     {
                         SendTelemetryEvent(FixVulnerabilitiesWithCopilotErrorType.NuGetSolverNotAvailable);
                         ShowWarningMessage(Resources.Error_NuGetSolverNotAvailable);