diff --git a/src/api/providers/__tests__/roo.spec.ts b/src/api/providers/__tests__/roo.spec.ts
index 458fa228636..8eadb9f6943 100644
--- a/src/api/providers/__tests__/roo.spec.ts
+++ b/src/api/providers/__tests__/roo.spec.ts
@@ -102,6 +102,24 @@ vitest.mock("../../providers/fetchers/modelCache", () => ({
 					inputPrice: 0,
 					outputPrice: 0,
 				},
+				"minimax/minimax-m2": {
+					maxTokens: 32_768,
+					contextWindow: 1_000_000,
+					supportsImages: false,
+					supportsPromptCache: true,
+					supportsNativeTools: true,
+					inputPrice: 0.15,
+					outputPrice: 0.6,
+				},
+				"anthropic/claude-haiku-4.5": {
+					maxTokens: 8_192,
+					contextWindow: 200_000,
+					supportsImages: true,
+					supportsPromptCache: true,
+					supportsNativeTools: true,
+					inputPrice: 0.8,
+					outputPrice: 4,
+				},
 			}
 		}
 		return {}
@@ -402,6 +420,41 @@ describe("RooHandler", () => {
 				expect(modelInfo.info.contextWindow).toBeDefined()
 			}
 		})
+
+		it("should apply defaultToolProtocol: native for minimax/minimax-m2", () => {
+			const handlerWithMinimax = new RooHandler({
+				apiModelId: "minimax/minimax-m2",
+			})
+			const modelInfo = handlerWithMinimax.getModel()
+			expect(modelInfo.id).toBe("minimax/minimax-m2")
+			expect((modelInfo.info as any).defaultToolProtocol).toBe("native")
+			// Verify cached model info is preserved
+			expect(modelInfo.info.maxTokens).toBe(32_768)
+			expect(modelInfo.info.contextWindow).toBe(1_000_000)
+		})
+
+		it("should apply defaultToolProtocol: native for anthropic/claude-haiku-4.5", () => {
+			const handlerWithHaiku = new RooHandler({
+				apiModelId: "anthropic/claude-haiku-4.5",
+			})
+			const modelInfo = handlerWithHaiku.getModel()
+			expect(modelInfo.id).toBe("anthropic/claude-haiku-4.5")
+			expect((modelInfo.info as any).defaultToolProtocol).toBe("native")
+			// Verify cached model info is preserved
+			expect(modelInfo.info.maxTokens).toBe(8_192)
+			expect(modelInfo.info.contextWindow).toBe(200_000)
+		})
+
+		it("should not override existing properties when applying MODEL_DEFAULTS", () => {
+			const handlerWithMinimax = new RooHandler({
+				apiModelId: "minimax/minimax-m2",
+			})
+			const modelInfo = handlerWithMinimax.getModel()
+			// The defaults should be merged, but not overwrite existing cached values
+			expect(modelInfo.info.supportsNativeTools).toBe(true)
+			expect(modelInfo.info.inputPrice).toBe(0.15)
+			expect(modelInfo.info.outputPrice).toBe(0.6)
+		})
 	})
 
 	describe("temperature and model configuration", () => {
diff --git a/src/api/providers/roo.ts b/src/api/providers/roo.ts
index 0d5590e74c7..fa39abc97f5 100644
--- a/src/api/providers/roo.ts
+++ b/src/api/providers/roo.ts
@@ -18,6 +18,18 @@ import { handleOpenAIError } from "./utils/openai-error-handler"
 import { generateImageWithProvider, ImageGenerationResult } from "./utils/image-generation"
 import { t } from "../../i18n"
 
+import type { ModelInfo } from "@roo-code/types"
+
+// Model-specific defaults that should be applied even when models come from API cache
+const MODEL_DEFAULTS: Record<string, Partial<ModelInfo>> = {
+	"minimax/minimax-m2": {
+		defaultToolProtocol: "native",
+	},
+	"anthropic/claude-haiku-4.5": {
+		defaultToolProtocol: "native",
+	},
+}
+
 // Extend OpenAI's CompletionUsage to include Roo specific fields
 interface RooUsage extends OpenAI.CompletionUsage {
 	cache_creation_input_tokens?: number
@@ -245,8 +257,13 @@ export class RooHandler extends BaseOpenAiCompatibleProvider<string> {
 		const models = getModelsFromCache("roo") || {}
 		const modelInfo = models[modelId]
 
+		// Get model-specific defaults if they exist
+		const modelDefaults = MODEL_DEFAULTS[modelId]
+
 		if (modelInfo) {
-			return { id: modelId, info: modelInfo }
+			// Merge model-specific defaults with cached model info
+			const mergedInfo = modelDefaults ? { ...modelInfo, ...modelDefaults } : modelInfo
+			return { id: modelId, info: mergedInfo }
 		}
 
 		// Return the requested model ID even if not found, with fallback info.