fix: serialize standard context tools

Guard tool extraction so that when context tools expose a `standard_tools` list we include both their raw form and a sanitized serialized version with name/description tuples; fall back to the previous behavior otherwise.

Author: sysradium

src/pipecat/utils/tracing/service_decorators.py

@@ -995,10 +995,25 @@ async def wrapper(self, *args, **kwargs):
                                 try:
                                     context_tools = getattr(self._context, "tools", None)
                                     if context_tools and not operation_attrs.get("tools"):
-                                        operation_attrs["tools"] = context_tools
-                                        operation_attrs["tools_serialized"] = json.dumps(
-                                            context_tools
-                                        )
+                                        if hasattr(context_tools, "standard_tools"):
+                                            tools_list = context_tools.standard_tools
+                                            operation_attrs["tools"] = tools_list
+                                            operation_attrs["tools_serialized"] = json.dumps(
+                                                [
+                                                    {
+                                                        "name": getattr(t, "name", "unknown"),
+                                                        "description": getattr(
+                                                            t, "description", ""
+                                                        ),
+                                                    }
+                                                    for t in tools_list
+                                                ]
+                                            )
+                                        else:
+                                            operation_attrs["tools"] = context_tools
+                                            operation_attrs["tools_serialized"] = json.dumps(
+                                                context_tools
+                                            )
                                 except Exception as e:
                                     logging.warning(f"Error extracting context tools: {e}")