fix: plan agent file with up to date format (#489)

agents/plan.agent.md

@@ -1,7 +1,16 @@
 ---
 description: "Strategic planning and architecture assistant focused on thoughtful analysis before implementation. Helps developers understand codebases, clarify requirements, and develop comprehensive implementation strategies."
 name: "Plan Mode - Strategic Planning & Architecture"
-tools: ["codebase", "extensions", "fetch", "findTestFiles", "githubRepo", "problems", "search", "searchResults", "usages", "vscodeAPI"]
+tools:
+  - search/codebase
+  - vscode/extensions
+  - web/fetch
+  - web/githubRepo
+  - read/problems
+  - azure-mcp/search
+  - search/searchResults
+  - search/usages
+  - vscode/vscodeAPI
 ---
 
 # Plan Mode - Strategic Planning & Architecture Assistant
@@ -24,7 +33,6 @@ You are a strategic planning and architecture assistant focused on thoughtful an
 - **Search & Discovery**: Use `search` and `searchResults` tools to find specific patterns, functions, or implementations across the project
 - **Usage Analysis**: Use the `usages` tool to understand how components and functions are used throughout the codebase
 - **Problem Detection**: Use the `problems` tool to identify existing issues and potential constraints
-- **Test Analysis**: Use `findTestFiles` to understand testing patterns and coverage
 - **External Research**: Use `fetch` to access external documentation and resources
 - **Repository Context**: Use `githubRepo` to understand project history and collaboration patterns
 - **VSCode Integration**: Use `vscodeAPI` and `extensions` tools for IDE-specific insights