diff --git a/src/bus/message.rs b/src/bus/message.rs
index 959e384..0d99009 100644
--- a/src/bus/message.rs
+++ b/src/bus/message.rs
@@ -319,15 +319,7 @@ impl OutboundMessage {
                     )]
                 }
             }
-            "tool" => vec![Self::tool_result(
-                channel.to_string(),
-                chat_id.to_string(),
-                message.tool_call_id.clone().unwrap_or_else(|| message.id.clone()),
-                message.tool_name.clone().unwrap_or_else(|| "tool".to_string()),
-                message.content.clone(),
-                reply_to,
-                metadata.clone(),
-            )],
+            "tool" => Vec::new(),
             _ => Vec::new(),
         }
     }
@@ -404,7 +396,7 @@ mod tests {
     }
 
     #[test]
-    fn test_from_chat_message_maps_tool_result() {
+    fn test_from_chat_message_omits_tool_result() {
         let message = ChatMessage::tool("call-9", "calculator", "2");
 
         let outbound = OutboundMessage::from_chat_message(
@@ -415,10 +407,6 @@ mod tests {
             &message,
         );
 
-        assert_eq!(outbound.len(), 1);
-        assert_eq!(outbound[0].event_kind, OutboundEventKind::ToolResult);
-        assert_eq!(outbound[0].tool_call_id.as_deref(), Some("call-9"));
-        assert_eq!(outbound[0].tool_name.as_deref(), Some("calculator"));
-        assert!(outbound[0].content.contains("工具结果: calculator"));
+        assert!(outbound.is_empty());
     }
 }
diff --git a/src/gateway/ws.rs b/src/gateway/ws.rs
index 9d37879..1c17c1d 100644
--- a/src/gateway/ws.rs
+++ b/src/gateway/ws.rs
@@ -172,17 +172,7 @@ fn ws_outbound_from_chat_message(message: &ChatMessage) -> Vec<WsOutbound> {
                 }]
             }
         }
-        "tool" => vec![WsOutbound::ToolResult {
-            id: message.id.clone(),
-            tool_call_id: message.tool_call_id.clone().unwrap_or_else(|| message.id.clone()),
-            tool_name: message.tool_name.clone().unwrap_or_else(|| "tool".to_string()),
-            content: format!(
-                "工具结果: {}\n\n{}",
-                message.tool_name.clone().unwrap_or_else(|| "tool".to_string()),
-                message.content,
-            ),
-            role: message.role.clone(),
-        }],
+        "tool" => Vec::new(),
         _ => Vec::new(),
     }
 }
@@ -379,3 +369,45 @@ async fn handle_inbound(
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::ws_outbound_from_chat_message;
+    use crate::bus::ChatMessage;
+    use crate::providers::ToolCall;
+    use crate::protocol::WsOutbound;
+    use serde_json::json;
+
+    #[test]
+    fn test_ws_outbound_from_chat_message_expands_tool_calls() {
+        let message = ChatMessage::assistant_with_tool_calls(
+            "",
+            vec![ToolCall {
+                id: "call-1".to_string(),
+                name: "calculator".to_string(),
+                arguments: json!({"expression": "1 + 1"}),
+            }],
+        );
+
+        let outbound = ws_outbound_from_chat_message(&message);
+
+        assert_eq!(outbound.len(), 1);
+        match &outbound[0] {
+            WsOutbound::ToolCall { tool_call_id, tool_name, arguments, .. } => {
+                assert_eq!(tool_call_id, "call-1");
+                assert_eq!(tool_name, "calculator");
+                assert_eq!(arguments["expression"], "1 + 1");
+            }
+            other => panic!("unexpected outbound variant: {:?}", other),
+        }
+    }
+
+    #[test]
+    fn test_ws_outbound_from_chat_message_omits_tool_results() {
+        let message = ChatMessage::tool("call-1", "calculator", "2");
+
+        let outbound = ws_outbound_from_chat_message(&message);
+
+        assert!(outbound.is_empty());
+    }
+}