diff --git a/openspace/cloud/embedding.py b/openspace/cloud/embedding.py
index 6606936..493ff52 100644
--- a/openspace/cloud/embedding.py
+++ b/openspace/cloud/embedding.py
@@ -121,9 +121,25 @@ def generate_embedding(text: str, api_key: Optional[str] = None) -> Optional[Lis
         method="POST",
     )
     try:
-        with urllib.request.urlopen(req, timeout=15) as resp:
-            data = json.loads(resp.read().decode("utf-8"))
-            return data.get("data", [{}])[0].get("embedding")
-    except Exception as e:
-        logger.warning("Embedding generation failed: %s", e)
-        return None
+    with urllib.request.urlopen(req, timeout=15) as resp:
+        data = json.loads(resp.read().decode("utf-8"))
+        
+        # 验证 API 响应结构
+        data_list = data.get("data")
+        if not data_list or not isinstance(data_list, list) or len(data_list) == 0:
+            logger.warning("Embedding API response missing or invalid 'data' array")
+            return None
+        
+        embedding = data_list[0].get("embedding")
+        if not embedding:
+            logger.warning("Embedding API response missing 'embedding' field")
+            return None
+        
+        return embedding
+except urllib.error.HTTPError as e:
+    logger.warning(f"Embedding API HTTP error: {e.code} {e.reason}")
+    return None
+except Exception as e:
+    logger.warning("Embedding generation failed: %s", e)
+    return None
+
diff --git a/openspace/llm/client.py b/openspace/llm/client.py
index 611cf87..3b49181 100644
--- a/openspace/llm/client.py
+++ b/openspace/llm/client.py
@@ -777,8 +777,8 @@ async def complete(
                     
                     args_str = json.dumps(args, ensure_ascii=False)[:200]
                     self._logger.info(f"Calling {tool_name} with args: {args_str}")
-                except:
-                    pass
+                except (json.JSONDecodeError, ValueError, TypeError) as e:
+                    self._logger.debug(f"Failed to parse tool arguments for {tool_name}: {e}")
                 
                 if tool_obj is None:
                     if ambiguous_tool_names:
diff --git a/openspace/skill_engine/skill_ranker.py b/openspace/skill_engine/skill_ranker.py
index 503eda5..c0a409d 100644
--- a/openspace/skill_engine/skill_ranker.py
+++ b/openspace/skill_engine/skill_ranker.py
@@ -340,7 +340,17 @@ def _generate_embedding(
             try:
                 with urllib.request.urlopen(req, timeout=15) as resp:
                     data = json.loads(resp.read().decode("utf-8"))
-                    return data.get("data", [{}])[0].get("embedding")
+                    
+                    data_list = data.get("data")
+                    if not data_list or not isinstance(data_list, list):
+                        logger.warning(f"Invalid embedding API response: missing 'data' array")
+                        return None
+                             
+                    embedding = data_list[0].get("embedding")
+                    if not embedding:
+                        logger.warning("Embedding API response missing 'embedding' field in first result")
+                        return None
+                    return embedding
             except Exception as e:
                 last_err = e
                 if attempt < 2:
diff --git a/openspace/tool_layer.py b/openspace/tool_layer.py
index 7ceb447..0d7052a 100644
--- a/openspace/tool_layer.py
+++ b/openspace/tool_layer.py
@@ -355,8 +355,10 @@ async def execute(
         self._running = True
         self._task_done.clear()
         self._last_evolved_skills = []  # Reset per-execution tracking
+        start_time = asyncio.get_running_loop().time()
         self._capture_skill_dir = capture_skill_dir
         start_time = asyncio.get_event_loop().time()
+    
         # Use external task_id if provided, otherwise generate one
         if task_id is None:
             task_id = f"task_{uuid.uuid4().hex[:12]}"