diff --git a/backend/api/server.py b/backend/api/server.py
index 616fc48..c371858 100644
--- a/backend/api/server.py
+++ b/backend/api/server.py
@@ -2634,10 +2634,10 @@ def _create_feishu_online_spreadsheet(
     create_params: dict[str, Any] = {'title': title}
     if folder_token and folder_token.strip():
         create_params['folder_token'] = folder_token.strip()
-    rendered, metadata = runtime.call_tool(
+    rendered, metadata = _call_feishu_mcp_tool_checked(
+        runtime,
         'sheet_ops',
         arguments={'action': 'create', 'params': create_params},
-        server_name=FEISHU_MCP_SERVER_NAME,
         max_chars=API_TOOL_CONTENT_MAX_CHARS,
         timeout_seconds=60.0,
     )
@@ -2645,13 +2645,14 @@ def _create_feishu_online_spreadsheet(
     if not spreadsheet_token:
         raise DataAgentInputError('飞书表格已创建，但没有解析到 spreadsheet token')
 
-    sheet_refs = _discover_feishu_sheet_refs(runtime, spreadsheet_token)
     for index, sheet_data in enumerate(sheets):
         rows = sheet_data['rows']
         if not rows:
             continue
         if index == 0:
-            sheet_ref = sheet_refs[0] if sheet_refs else 'Sheet1'
+            # 新建飞书表格默认会带一个名为 Sheet1 的工作表。
+            # 不从 spreadsheet meta 里取顶层 title，避免把文件名误当成工作表名。
+            sheet_ref = 'Sheet1'
         else:
             sheet_ref = _create_feishu_worksheet(
                 runtime,
@@ -2663,6 +2664,44 @@ def _create_feishu_online_spreadsheet(
     return rendered, metadata
 
 
+def _call_feishu_mcp_tool_checked(
+    runtime: MCPRuntime,
+    tool_name: str,
+    *,
+    arguments: dict[str, Any],
+    max_chars: int,
+    timeout_seconds: float,
+) -> tuple[str, dict[str, Any]]:
+    rendered, metadata = runtime.call_tool(
+        tool_name,
+        arguments=arguments,
+        server_name=FEISHU_MCP_SERVER_NAME,
+        max_chars=max_chars,
+        timeout_seconds=timeout_seconds,
+    )
+    error_message = _extract_feishu_mcp_error(rendered)
+    if metadata.get('is_error') or error_message:
+        raise DataAgentInputError(error_message or f'飞书 MCP 工具 {tool_name} 调用失败')
+    return rendered, metadata
+
+
+def _extract_feishu_mcp_error(text: str) -> str | None:
+    payload = _parse_first_json_object(text)
+    if not isinstance(payload, dict):
+        return None
+    error_value = payload.get('error')
+    if not error_value:
+        return None
+    suggestion = payload.get('suggestion')
+    code = payload.get('code')
+    parts = [str(error_value)]
+    if code is not None:
+        parts.append(f'code={code}')
+    if suggestion:
+        parts.append(str(suggestion))
+    return '；'.join(parts)
+
+
 def _load_file_as_feishu_sheets(file_path: Path) -> list[dict[str, Any]]:
     suffix = file_path.suffix.lower()
     if suffix == '.csv':
@@ -2762,10 +2801,10 @@ def _extract_feishu_spreadsheet_token(text: str) -> str | None:
 
 def _discover_feishu_sheet_refs(runtime: MCPRuntime, spreadsheet_token: str) -> list[str]:
     try:
-        rendered, _metadata = runtime.call_tool(
+        rendered, _metadata = _call_feishu_mcp_tool_checked(
+            runtime,
             'sheet_ops',
             arguments={'action': 'meta', 'params': {'url_or_token': spreadsheet_token}},
-            server_name=FEISHU_MCP_SERVER_NAME,
             max_chars=API_TOOL_CONTENT_MAX_CHARS,
             timeout_seconds=60.0,
         )
@@ -2785,7 +2824,11 @@ def _extract_feishu_sheet_refs(text: str) -> list[str]:
             raw_title = value.get('title') or value.get('name')
             if isinstance(raw_id, str) and raw_id.strip():
                 refs.append(raw_id.strip())
-            elif isinstance(raw_title, str) and raw_title.strip():
+            elif (
+                isinstance(raw_title, str)
+                and raw_title.strip()
+                and ('index' in value or 'row_count' in value or 'col_count' in value)
+            ):
                 refs.append(raw_title.strip())
             for child in value.values():
                 visit(child)
@@ -2816,7 +2859,8 @@ def _create_feishu_worksheet(
     index: int,
 ) -> str:
     sheet_title = _clean_feishu_sheet_title(title) or f'Sheet{index + 1}'
-    rendered, _metadata = runtime.call_tool(
+    rendered, _metadata = _call_feishu_mcp_tool_checked(
+        runtime,
         'sheet_ops',
         arguments={
             'action': 'add_sheet',
@@ -2826,7 +2870,6 @@ def _create_feishu_worksheet(
                 'index': index,
             },
         },
-        server_name=FEISHU_MCP_SERVER_NAME,
         max_chars=API_TOOL_CONTENT_MAX_CHARS,
         timeout_seconds=60.0,
     )
@@ -2848,7 +2891,8 @@ def _write_feishu_sheet_rows(
         chunk = rows[start : start + FEISHU_SPREADSHEET_WRITE_BATCH_ROWS]
         start_row = start + 1
         end_row = start + len(chunk)
-        runtime.call_tool(
+        _call_feishu_mcp_tool_checked(
+            runtime,
             'sheet_ops',
             arguments={
                 'action': 'write',
@@ -2858,7 +2902,6 @@ def _write_feishu_sheet_rows(
                     'values': json.dumps(chunk, ensure_ascii=False),
                 },
             },
-            server_name=FEISHU_MCP_SERVER_NAME,
             max_chars=API_TOOL_CONTENT_MAX_CHARS,
             timeout_seconds=60.0,
         )
diff --git a/tests/test_feishu_integration.py b/tests/test_feishu_integration.py
index 2f0b20d..7360c79 100644
--- a/tests/test_feishu_integration.py
+++ b/tests/test_feishu_integration.py
@@ -130,10 +130,6 @@ class FeishuIntegrationTests(unittest.TestCase):
                         '{"url":"https://mi.feishu.cn/sheets/shtcn123","spreadsheet_token":"shtcn123"}',
                         {'server_name': 'feishu-mcp-pro', 'tool_name': 'sheet_ops'},
                     ),
-                    (
-                        '{"sheets":[{"sheet_id":"abc123","title":"Sheet1"}]}',
-                        {'server_name': 'feishu-mcp-pro', 'tool_name': 'sheet_ops'},
-                    ),
                     (
                         '{"ok":true}',
                         {'server_name': 'feishu-mcp-pro', 'tool_name': 'sheet_ops'},
@@ -149,12 +145,12 @@ class FeishuIntegrationTests(unittest.TestCase):
             payload = response.json()
             self.assertEqual(payload['kind'], 'sheet')
             self.assertEqual(payload['url'], 'https://mi.feishu.cn/sheets/shtcn123')
-            self.assertEqual(call_tool.call_count, 3)
+            self.assertEqual(call_tool.call_count, 2)
             self.assertEqual(call_tool.call_args_list[0].args[0], 'sheet_ops')
             self.assertEqual(call_tool.call_args_list[0].kwargs['arguments']['action'], 'create')
-            self.assertEqual(call_tool.call_args_list[2].kwargs['arguments']['action'], 'write')
-            write_params = call_tool.call_args_list[2].kwargs['arguments']['params']
-            self.assertEqual(write_params['range'], 'abc123!A1:B2')
+            self.assertEqual(call_tool.call_args_list[1].kwargs['arguments']['action'], 'write')
+            write_params = call_tool.call_args_list[1].kwargs['arguments']['params']
+            self.assertEqual(write_params['range'], 'Sheet1!A1:B2')
             self.assertEqual(
                 json.loads(write_params['values']),
                 [['query', 'label'], ['导航到公司', 'Agent(tag="地图导航")']],
@@ -168,6 +164,42 @@ class FeishuIntegrationTests(unittest.TestCase):
             online_docs = json.loads(map_path.read_text(encoding='utf-8'))
             self.assertEqual(online_docs['files'][str(file_path)]['kind'], 'sheet')
 
+    def test_create_online_doc_surfaces_feishu_sheet_write_error(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            client, state = _build_client(Path(tmp_dir))
+            file_path = _write_account_file(
+                state,
+                'alice',
+                'records.csv',
+                'query,label\n导航到公司,地图导航\n',
+            )
+
+            with patch.object(
+                gui_server,
+                '_feishu_status_payload',
+                return_value={'logged_in': True, 'status': 'logged_in'},
+            ), patch.object(
+                gui_server.MCPRuntime,
+                'call_tool',
+                side_effect=[
+                    (
+                        '{"url":"https://mi.feishu.cn/sheets/shtcn123","spreadsheet_token":"shtcn123"}',
+                        {'server_name': 'feishu-mcp-pro', 'tool_name': 'sheet_ops'},
+                    ),
+                    (
+                        '{"error":"Sheet not found","code":123}',
+                        {'server_name': 'feishu-mcp-pro', 'tool_name': 'sheet_ops'},
+                    ),
+                ],
+            ):
+                response = client.post(
+                    '/api/files/online-doc',
+                    json={'account_id': 'alice', 'path': str(file_path)},
+                )
+
+        self.assertEqual(response.status_code, 400)
+        self.assertIn('Sheet not found', response.json()['detail'])
+
     def test_extract_first_url_ignores_wrapping_quotes(self) -> None:
         url = gui_server._extract_first_url(
             '{"url":"https://mi.feishu.cn/docx/CZIldpM3QofbbXxxAq1cEininTd"}'