diff --git a/src/takopi/runners/codex.py b/src/takopi/runners/codex.py
index 111cea3..ff7d595 100644
--- a/src/takopi/runners/codex.py
+++ b/src/takopi/runners/codex.py
@@ -129,8 +129,15 @@ def _summarize_tool_result(result: Any) -> dict[str, Any] | None:
         summary["content_blocks"] = len(content)
     elif content is not None:
         summary["content_blocks"] = 1
-    if "structured" in result:
-        summary["has_structured"] = bool(result.get("structured"))
+
+    structured_key: str | None = None
+    if "structured_content" in result:
+        structured_key = "structured_content"
+    elif "structured" in result:
+        structured_key = "structured"
+
+    if structured_key is not None:
+        summary["has_structured"] = result.get(structured_key) is not None
     return summary or None
 
 
diff --git a/tests/test_codex_tool_result_summary.py b/tests/test_codex_tool_result_summary.py
new file mode 100644
index 0000000..b93e194
--- /dev/null
+++ b/tests/test_codex_tool_result_summary.py
@@ -0,0 +1,69 @@
+from takopi.model import ActionEvent
+from takopi.runners.codex import translate_codex_event
+
+
+def test_translate_mcp_tool_call_summarizes_structured_content() -> None:
+    evt = {
+        "type": "item.completed",
+        "item": {
+            "id": "item_1",
+            "type": "mcp_tool_call",
+            "server": "docs",
+            "tool": "search",
+            "arguments": {"q": "hi"},
+            "result": {
+                "content": [{"type": "text", "text": "ok"}],
+                "structured_content": {"matches": 3},
+            },
+            "error": None,
+            "status": "completed",
+        },
+    }
+
+    out = translate_codex_event(evt, title="Codex")
+    assert len(out) == 1
+    assert isinstance(out[0], ActionEvent)
+    summary = out[0].action.detail["result_summary"]
+    assert summary["content_blocks"] == 1
+    assert summary["has_structured"] is True
+
+
+def test_translate_mcp_tool_call_summarizes_null_structured_content() -> None:
+    evt = {
+        "type": "item.completed",
+        "item": {
+            "id": "item_2",
+            "type": "mcp_tool_call",
+            "server": "docs",
+            "tool": "search",
+            "result": {"content": [], "structured_content": None},
+            "error": None,
+            "status": "completed",
+        },
+    }
+
+    out = translate_codex_event(evt, title="Codex")
+    assert len(out) == 1
+    assert isinstance(out[0], ActionEvent)
+    assert out[0].action.detail["result_summary"]["has_structured"] is False
+
+
+def test_translate_mcp_tool_call_summarizes_legacy_structured_key() -> None:
+    evt = {
+        "type": "item.completed",
+        "item": {
+            "id": "item_3",
+            "type": "mcp_tool_call",
+            "server": "docs",
+            "tool": "search",
+            "result": {"structured": {"matches": 3}},
+            "error": None,
+            "status": "completed",
+        },
+    }
+
+    out = translate_codex_event(evt, title="Codex")
+    assert len(out) == 1
+    assert isinstance(out[0], ActionEvent)
+    assert out[0].action.detail["result_summary"]["has_structured"] is True
+