Add server tool timeout protection

engine/core/duplex_pipeline.py

@@ -58,6 +58,7 @@ class DuplexPipeline:
     _SENTENCE_CLOSERS = frozenset({'"', "'", "”", "’", ")", "]", "}", "）", "】", "」", "』", "》"})
     _MIN_SPLIT_SPOKEN_CHARS = 6
     _TOOL_WAIT_TIMEOUT_SECONDS = 15.0
+    _SERVER_TOOL_TIMEOUT_SECONDS = 15.0
     _DEFAULT_TOOL_SCHEMAS: Dict[str, Dict[str, Any]] = {
         "search": {
             "name": "search",
@@ -984,7 +985,18 @@ class DuplexPipeline:
                         tool_results.append(result)
                         continue
 
-                    result = await execute_server_tool(call)
+                    try:
+                        result = await asyncio.wait_for(
+                            execute_server_tool(call),
+                            timeout=self._SERVER_TOOL_TIMEOUT_SECONDS,
+                        )
+                    except asyncio.TimeoutError:
+                        result = {
+                            "tool_call_id": call_id,
+                            "name": self._tool_name(call) or "unknown_tool",
+                            "output": {"message": "server tool timeout"},
+                            "status": {"code": 504, "message": "server_tool_timeout"},
+                        }
                     await self._emit_tool_result(result, source="server")
                     tool_results.append(result)