feat: change defaultToolProtocol default from xml to native (#9892)

* feat: change defaultToolProtocol to default to native instead of xml

* fix: add missing getMcpHub mock to Subtask Rate Limiting tests

---------

Co-authored-by: Roo Code <roomote@roocode.com>

src/core/task/__tests__/Task.spec.ts

@@ -981,6 +981,7 @@ describe("Cline", () => {
 					getState: vi.fn().mockResolvedValue({
 						apiConfiguration: mockApiConfig,
 					}),
+					getMcpHub: vi.fn().mockReturnValue(undefined),
 					say: vi.fn(),
 					postStateToWebview: vi.fn().mockResolvedValue(undefined),
 					postMessageToWebview: vi.fn().mockResolvedValue(undefined),

src/utils/__tests__/resolveToolProtocol.spec.ts

@@ -139,18 +139,24 @@ describe("resolveToolProtocol", () => {
 		})
 	})
 
-	describe("Precedence Level 3: XML Fallback", () => {
-		it("should use XML fallback when no model default is specified", () => {
+	describe("Precedence Level 3: Native Fallback", () => {
+		it("should use Native fallback when no model default is specified and model supports native", () => {
 			const settings: ProviderSettings = {
 				apiProvider: "anthropic",
 			}
-			const result = resolveToolProtocol(settings, undefined)
-			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback
+			const modelInfo: ModelInfo = {
+				maxTokens: 4096,
+				contextWindow: 128000,
+				supportsPromptCache: false,
+				supportsNativeTools: true,
+			}
+			const result = resolveToolProtocol(settings, modelInfo)
+			expect(result).toBe(TOOL_PROTOCOL.NATIVE) // Native fallback
 		})
 	})
 
 	describe("Complete Precedence Chain", () => {
-		it("should respect full precedence: Profile > Model Default > XML Fallback", () => {
+		it("should respect full precedence: Profile > Model Default > Native Fallback", () => {
 			// Set up a scenario with all levels defined
 			const settings: ProviderSettings = {
 				toolProtocol: "native", // Level 1: User profile setting
@@ -186,7 +192,7 @@ describe("resolveToolProtocol", () => {
 			expect(result).toBe(TOOL_PROTOCOL.XML) // Model default wins
 		})
 
-		it("should skip to XML fallback when profile and model default are undefined", () => {
+		it("should skip to Native fallback when profile and model default are undefined", () => {
 			const settings: ProviderSettings = {
 				apiProvider: "openai-native",
 			}
@@ -199,7 +205,7 @@ describe("resolveToolProtocol", () => {
 			}
 
 			const result = resolveToolProtocol(settings, modelInfo)
-			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback
+			expect(result).toBe(TOOL_PROTOCOL.NATIVE) // Native fallback
 		})
 
 		it("should skip to XML fallback when model info is unavailable", () => {
@@ -208,7 +214,7 @@ describe("resolveToolProtocol", () => {
 			}
 
 			const result = resolveToolProtocol(settings, undefined)
-			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback
+			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback (no model info means no native support)
 		})
 	})
 
@@ -216,7 +222,7 @@ describe("resolveToolProtocol", () => {
 		it("should handle missing provider name gracefully", () => {
 			const settings: ProviderSettings = {}
 			const result = resolveToolProtocol(settings)
-			expect(result).toBe(TOOL_PROTOCOL.XML) // Falls back to global
+			expect(result).toBe(TOOL_PROTOCOL.XML) // Falls back to XML (no model info)
 		})
 
 		it("should handle undefined model info gracefully", () => {
@@ -224,7 +230,7 @@ describe("resolveToolProtocol", () => {
 				apiProvider: "openai-native",
 			}
 			const result = resolveToolProtocol(settings, undefined)
-			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback
+			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback (no model info)
 		})
 
 		it("should fall back to XML when model doesn't support native", () => {
@@ -243,7 +249,7 @@ describe("resolveToolProtocol", () => {
 	})
 
 	describe("Real-world Scenarios", () => {
-		it("should use XML fallback for models without defaultToolProtocol", () => {
+		it("should use Native fallback for models without defaultToolProtocol", () => {
 			const settings: ProviderSettings = {
 				apiProvider: "openai-native",
 			}
@@ -254,7 +260,7 @@ describe("resolveToolProtocol", () => {
 				supportsNativeTools: true,
 			}
 			const result = resolveToolProtocol(settings, modelInfo)
-			expect(result).toBe(TOOL_PROTOCOL.XML) // XML fallback
+			expect(result).toBe(TOOL_PROTOCOL.NATIVE) // Native fallback
 		})
 
 		it("should use XML for Claude models with Anthropic provider", () => {

src/utils/resolveToolProtocol.ts

@@ -6,7 +6,7 @@ import type { ProviderSettings, ModelInfo } from "@roo-code/types"
  *
  * 1. User Preference - Per-Profile (explicit profile setting)
  * 2. Model Default (defaultToolProtocol in ModelInfo)
- * 3. XML Fallback (final fallback)
+ * 3. Native Fallback (final fallback)
  *
  * Then check support: if protocol is "native" but model doesn't support it, use XML.
  *
@@ -31,6 +31,6 @@ export function resolveToolProtocol(providerSettings: ProviderSettings, modelInf
 		return modelInfo.defaultToolProtocol
 	}
 
-	// 3. XML Fallback
-	return TOOL_PROTOCOL.XML
+	// 3. Native Fallback
+	return TOOL_PROTOCOL.NATIVE
 }

webview-ui/src/components/settings/ApiOptions.tsx

@@ -421,8 +421,8 @@ const ApiOptions = ({
 	// Mirrors the simplified logic in resolveToolProtocol.ts:
 	// 1. User preference (toolProtocol) - handled by the select value binding
 	// 2. Model default - use if available
-	// 3. XML fallback
-	const defaultProtocol = selectedModelInfo?.defaultToolProtocol || TOOL_PROTOCOL.XML
+	// 3. Native fallback
+	const defaultProtocol = selectedModelInfo?.defaultToolProtocol || TOOL_PROTOCOL.NATIVE
 
 	// Show the tool protocol selector when model supports native tools
 	const showToolProtocolSelector = selectedModelInfo?.supportsNativeTools === true