diff --git a/web/src/app/chat/components/research-activities-block.tsx b/web/src/app/chat/components/research-activities-block.tsx
index ef808d3..b3ba900 100644
--- a/web/src/app/chat/components/research-activities-block.tsx
+++ b/web/src/app/chat/components/research-activities-block.tsx
@@ -104,21 +104,24 @@ const ActivityListItem = React.memo(({ messageId }: { messageId: string }) => {
   const message = useMessage(messageId);
   if (message) {
     if (!message.isStreaming && message.toolCalls?.length) {
-      for (const toolCall of message.toolCalls) {
-        if (typeof toolCall.result === "string" && toolCall.result?.startsWith("Error")) {
-          return null;
-        }
-        if (toolCall.name === "web_search") {
-          return <WebSearchToolCall key={toolCall.id} toolCall={toolCall} />;
-        } else if (toolCall.name === "crawl_tool") {
-          return <CrawlToolCall key={toolCall.id} toolCall={toolCall} />;
-        } else if (toolCall.name === "python_repl_tool") {
-          return <PythonToolCall key={toolCall.id} toolCall={toolCall} />;
-        } else if (toolCall.name === "local_search_tool") {
-          return <RetrieverToolCall key={toolCall.id} toolCall={toolCall} />;
-        } else {
-          return <MCPToolCall key={toolCall.id} toolCall={toolCall} />;
-        }
+      const toolCallComponents = message.toolCalls
+        .filter(toolCall => !(typeof toolCall.result === "string" && toolCall.result?.startsWith("Error")))
+        .map(toolCall => {
+          if (toolCall.name === "web_search") {
+            return <WebSearchToolCall key={toolCall.id} toolCall={toolCall} />;
+          } else if (toolCall.name === "crawl_tool") {
+            return <CrawlToolCall key={toolCall.id} toolCall={toolCall} />;
+          } else if (toolCall.name === "python_repl_tool") {
+            return <PythonToolCall key={toolCall.id} toolCall={toolCall} />;
+          } else if (toolCall.name === "local_search_tool") {
+            return <RetrieverToolCall key={toolCall.id} toolCall={toolCall} />;
+          } else {
+            return <MCPToolCall key={toolCall.id} toolCall={toolCall} />;
+          }
+        });
+      
+      if (toolCallComponents.length > 0) {
+        return <>{toolCallComponents}</>;
       }
     }
   }