diff --git a/app/agent/tools/impl/query_download_tasks.py b/app/agent/tools/impl/query_download_tasks.py
index 861809558..ef6e5924b 100644
--- a/app/agent/tools/impl/query_download_tasks.py
+++ b/app/agent/tools/impl/query_download_tasks.py
@@ -379,19 +379,22 @@ class QueryDownloadTasksTool(MoviePilotTool):
                     # 精简 media 字段
                     media = getattr(d, "media", None)
                     if media:
+                        media_data = (
+                            media.model_dump() if isinstance(media, BaseModel) else media
+                        )
                         simplified["media"] = {
-                            "type": media_type_to_agent(media.get("type")),
-                            "title": media.get("title"),
-                            "season": media.get("season"),
-                            "episode": media.get("episode"),
-                            "media_source": media.get("media_source"),
-                            "media_id": media.get("media_id"),
-                            "music_type": media.get("music_type"),
-                            "artists": media.get("artists"),
-                            "album": media.get("album"),
-                            "album_id": media.get("album_id"),
-                            "total_tracks": media.get("total_tracks"),
-                            "track_number": media.get("track_number"),
+                            "type": media_type_to_agent(media_data.get("type")),
+                            "title": media_data.get("title"),
+                            "season": media_data.get("season"),
+                            "episode": media_data.get("episode"),
+                            "media_source": media_data.get("media_source"),
+                            "media_id": media_data.get("media_id"),
+                            "music_type": media_data.get("music_type"),
+                            "artists": media_data.get("artists"),
+                            "album": media_data.get("album"),
+                            "album_id": media_data.get("album_id"),
+                            "total_tracks": media_data.get("total_tracks"),
+                            "track_number": media_data.get("track_number"),
                         }
                     simplified_downloads.append(simplified)
                 result_json = json.dumps(simplified_downloads, ensure_ascii=False, indent=2)
diff --git a/tests/test_agent_query_download_tasks_tool.py b/tests/test_agent_query_download_tasks_tool.py
index 71daacb3c..9ea2b1255 100644
--- a/tests/test_agent_query_download_tasks_tool.py
+++ b/tests/test_agent_query_download_tasks_tool.py
@@ -4,7 +4,8 @@ from types import SimpleNamespace
 from unittest.mock import MagicMock, patch
 
 from app.agent.tools.impl.query_download_tasks import QueryDownloadTasksTool
-from app.schemas.transfer import DownloaderTorrent
+from app.schemas.transfer import DownloadTaskMedia, DownloaderTorrent
+from app.schemas.types import MediaSource
 
 
 def _tool() -> QueryDownloadTasksTool:
@@ -109,6 +110,52 @@ def test_run_completed_status_formats_completed_download_tasks():
     assert payload[0]["trackers"] == ["https://tracker.example/announce"]
 
 
+def test_run_formats_pydantic_download_task_media():
+    """下载任务媒体为 Pydantic 模型时应正常转换为 Agent 输出字段。"""
+    torrent = DownloaderTorrent(
+        downloader="qb",
+        hash="hash-with-media",
+        title="Movie With Media",
+        size=1024,
+        progress=100,
+        state="completed",
+        tags="moviepilot",
+        media=DownloadTaskMedia(
+            type="电影",
+            title="补全标题",
+            season=1,
+            episode=[2, 3],
+            media_source=MediaSource.TMDB,
+            media_id="123",
+        ),
+    )
+
+    with patch.object(
+        QueryDownloadTasksTool,
+        "_query_downloads_sync",
+        return_value={"downloads": [torrent]},
+    ):
+        result = asyncio.run(
+            QueryDownloadTasksTool(session_id="session-1", user_id="10001").run()
+        )
+
+    payload = json.loads(result)
+    assert payload[0]["media"] == {
+        "type": "movie",
+        "title": "补全标题",
+        "season": 1,
+        "episode": [2, 3],
+        "media_source": MediaSource.TMDB,
+        "media_id": "123",
+        "music_type": None,
+        "artists": [],
+        "album": None,
+        "album_id": None,
+        "total_tracks": None,
+        "track_number": None,
+    }
+
+
 def test_hash_query_loads_trackers_for_matching_task():
     """
     按 Hash 查询详情时应额外加载下载器支持的 Tracker 列表。