diff --git a/packages/provider-acp/src/server/runtimeModel.test.ts b/packages/provider-acp/src/server/runtimeModel.test.ts
index c35789ec47dc4..086628fcfae94 100644
--- a/packages/provider-acp/src/server/runtimeModel.test.ts
+++ b/packages/provider-acp/src/server/runtimeModel.test.ts
@@ -1366,6 +1366,20 @@ describe("extractMcpToolCallIdentity", () => {
     }
   });
 
+  it("recovers T3 identity from Kiro's @-scoped titles", () => {
+    for (const tool of ["html_render", "t3_thread_read", "delegate_task"]) {
+      const toolCall = toolCallFromUpdate({
+        sessionUpdate: "tool_call",
+        toolCallId: "kiro-1",
+        kind: "other",
+        title: `@t3-code/${tool}`,
+        status: "pending",
+        rawInput: { tool_id: `t3-code::${tool}`, arguments: { threadId: "thread-1" } },
+      });
+      expect(extractMcpToolCallIdentity(toolCall), tool).toEqual({ server: "t3-code", tool });
+    }
+  });
+
   it("does not claim an agent's own tool that shares a T3 tool name", () => {
     const toolCall = toolCallFromUpdate({
       sessionUpdate: "tool_call",
diff --git a/packages/provider-acp/src/server/runtimeModel.ts b/packages/provider-acp/src/server/runtimeModel.ts
index ba571af271d79..bc418eefcb228 100644
--- a/packages/provider-acp/src/server/runtimeModel.ts
+++ b/packages/provider-acp/src/server/runtimeModel.ts
@@ -1067,9 +1067,9 @@ function acpMcpFallbackInput(value: string | undefined): Record<string, unknown>
   return undefined;
 }
 
-// Known T3 inventory gates matches, so server-name separators can stay loose.
+// Known T3 inventory gates matches, so server-name separators can stay loose. Kiro titles "@t3-code/<tool>".
 const T3_MCP_TITLE_CALL =
-  /^(?:mcp[-_]{1,2})?t3[-_ ]?code[-_.:/ ]{1,3}(?<tool>[A-Za-z0-9][A-Za-z0-9_.-]*)(?::.*)?$/i;
+  /^(?:@|mcp[-_]{1,2})?t3[-_ ]?code[-_.:/ ]{1,3}(?<tool>[A-Za-z0-9][A-Za-z0-9_.-]*)(?::.*)?$/i;
 
 const T3_MCP_TITLE_SUFFIX_CALL =
   /^(?<tool>[A-Za-z0-9][A-Za-z0-9_.-]*?)(?: \(t3[-_ ]?code MCP Server\)(?::|$)|[-_.]t3[-_ ]?code$)/i;