diff --git a/extensions/arcee/index.test.ts b/extensions/arcee/index.test.ts
index 8379057b443..234f3aabfc1 100644
--- a/extensions/arcee/index.test.ts
+++ b/extensions/arcee/index.test.ts
@@ -92,6 +92,12 @@ describe("arcee provider plugin", () => {
       "trinity-large-preview",
       "trinity-large-thinking",
     ]);
+    expect(
+      catalogProvider.models?.find((model) => model.id === "trinity-large-thinking")?.compat,
+    ).toMatchObject({
+      supportsTools: false,
+      supportsReasoningEffort: false,
+    });
   });
 
   it("builds the OpenRouter-backed Arcee AI model catalog", async () => {
@@ -112,6 +118,12 @@ describe("arcee provider plugin", () => {
       "arcee/trinity-large-preview",
       "arcee/trinity-large-thinking",
     ]);
+    expect(
+      catalogProvider.models?.find((model) => model.id === "arcee/trinity-large-thinking")?.compat,
+    ).toMatchObject({
+      supportsTools: false,
+      supportsReasoningEffort: false,
+    });
   });
 
   it("normalizes Arcee OpenRouter models to vendor-prefixed runtime ids", async () => {
diff --git a/extensions/arcee/models.ts b/extensions/arcee/models.ts
index 399faed49a8..5c84d3a8e1b 100644
--- a/extensions/arcee/models.ts
+++ b/extensions/arcee/models.ts
@@ -45,6 +45,7 @@ export const ARCEE_MODEL_CATALOG: ModelDefinitionConfig[] = [
       cacheWrite: 0.25,
     },
     compat: {
+      supportsTools: false,
       supportsReasoningEffort: false,
     },
   },