Fix namespace: Microsoft.Mcp.Core.Areas.Server.Commands -> Microsoft.Mcp.Core.Areas.Server.Commands.ServerInstructions

[alzimmermsft]

What does this PR do?

Part of fixing namespaces in Microsoft.Mcp.Core, Microsoft.Mcp.Core.Areas.Server.Commands -> Microsoft.Mcp.Core.Areas.Server.Commands.ServerInstructions

GitHub issue number?

[Link to the GitHub issue this PR addresses]

Pre-merge Checklist

• Required for All PRs
  • Read contribution guidelines
  • PR title clearly describes the change
  • Commit history is clean with descriptive messages (cleanup guide)
  • Added comprehensive tests for new/modified functionality
  • Created a changelog entry if the change falls among the following: new feature, bug fix, UI/UX update, breaking change, or updated dependencies. Follow the changelog entry guide
• For MCP tool changes:
  • One tool per PR: This PR adds or modifies only one MCP tool for faster review cycles
  • Updated servers/Azure.Mcp.Server/README.md and/or servers/Fabric.Mcp.Server/README.md documentation
  • Validate README.md changes running the script ./eng/scripts/Process-PackageReadMe.ps1. See Package README
  • For new or modified tool descriptions, ran ToolDescriptionEvaluator and obtained a score of 0.4 or more and a top 3 ranking for all related test prompts
  • For tools with new names, including new tools or renamed tools, update consolidated-tools.json
  • For renamed tools, follow the Tool Rename Checklist and tag the PR with the breaking-change label
  • For new tools associated with Azure services or publicly available tools/APIs/products, add URL to documentation in the PR description
• Extra steps for Azure MCP Server tool changes:
  • Updated command list in servers/Azure.Mcp.Server/docs/azmcp-commands.md
  • Ran ./eng/scripts/Update-AzCommandsMetadata.ps1 to update tool metadata in azmcp-commands.md (required for CI)
  • Updated test prompts in servers/Azure.Mcp.Server/docs/e2eTestPrompts.md
  • 👉 For Community (non-Microsoft team member) PRs:
    • Security review: Reviewed code for security vulnerabilities, malicious code, or suspicious activities before running tests (crypto mining, spam, data exfiltration, etc.)
    • Manual tests run: added comment /azp run mcp - pullrequest - live to run Live Test Pipeline

[Copilot]

Pull request overview

This PR completes a namespace refactor in Microsoft.Mcp.Core by moving server-instructions types out of Microsoft.Mcp.Core.Areas.Server.Commands into the more specific Microsoft.Mcp.Core.Areas.Server.Commands.ServerInstructions, and updates downstream servers/tests to reference the new namespace.

Changes:

• Moved IServerInstructionsProvider, NullServerInstructionsProvider, and ResourceServerInstructionsProvider into ...Commands.ServerInstructions.
• Updated DI setup/entrypoints (Azure/Fabric/Template servers) and unit tests to import the new namespace.
• Cleaned up now-unused using directives in server Program.cs files.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
servers/Template.Mcp.Server/src/Program.cs	Updates using directives to the new ServerInstructions namespace and removes an unused localization import.
servers/Fabric.Mcp.Server/src/Program.cs	Updates using directives to the new ServerInstructions namespace and removes unused imports.
servers/Azure.Mcp.Server/src/Program.cs	Imports the new ServerInstructions namespace for instruction provider registration.
servers/Azure.Mcp.Server/tests/Azure.Mcp.Server.UnitTests/Infrastructure/ServiceRegistrationTests.cs	Updates the test import to the new ServerInstructions namespace.
core/Microsoft.Mcp.Core/src/Areas/Server/Commands/ServiceCollectionExtensions.cs	Imports the new namespace so server-options configuration continues to reference IServerInstructionsProvider.
core/Microsoft.Mcp.Core/src/Areas/Server/Commands/ServerInstructions/IServerInstructionsProvider.cs	Changes namespace to ...Commands.ServerInstructions.
core/Microsoft.Mcp.Core/src/Areas/Server/Commands/ServerInstructions/NullServerInstructionsProvider.cs	Changes namespace to ...Commands.ServerInstructions.
core/Microsoft.Mcp.Core/src/Areas/Server/Commands/ServerInstructions/ResourceServerInstructionsProvider.cs	Changes namespace to ...Commands.ServerInstructions.
core/Azure.Mcp.Core/tests/Azure.Mcp.Core.UnitTests/Areas/Server/Commands/ServiceCollectionExtensionsTests.cs	Imports the new ServerInstructions namespace to keep tests compiling.