Adjust create_or_update_file description to try avoid incorrect selection (#419)

* Adjust create_or_update_file description to try avoid incorrect selection

* Update pkg/github/repositories.go

Co-authored-by: Copilot <[email protected]>

---------

Co-authored-by: Copilot <[email protected]>

Author: williammartin

pkg/github/repositories.go

@@ -241,7 +241,7 @@ func ListBranches(getClient GetClientFn, t translations.TranslationHelperFunc) (
 // CreateOrUpdateFile creates a tool to create or update a file in a GitHub repository.
 func CreateOrUpdateFile(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
 	return mcp.NewTool("create_or_update_file",
-			mcp.WithDescription(t("TOOL_CREATE_OR_UPDATE_FILE_DESCRIPTION", "Create or update a single file in a GitHub repository. If updating, you must provide the SHA of the file you want to update.")),
+			mcp.WithDescription(t("TOOL_CREATE_OR_UPDATE_FILE_DESCRIPTION", "Create or update a single file in a GitHub repository. If updating, you must provide the SHA of the file you want to update. Use this tool to create or update a file in a GitHub repository remotely; do not use it for local file operations.")),
 			mcp.WithToolAnnotation(mcp.ToolAnnotation{
 				Title:        t("TOOL_CREATE_OR_UPDATE_FILE_USER_TITLE", "Create or update file"),
 				ReadOnlyHint: ToBoolPtr(false),