diff --git a/llama_stack/apis/common/content_types.py b/llama_stack/apis/common/content_types.py
index 121218a29..054ef2e18 100644
--- a/llama_stack/apis/common/content_types.py
+++ b/llama_stack/apis/common/content_types.py
@@ -27,6 +27,9 @@ class _URLOrData(BaseModel):
             return values
         return {"url": values}
 
+    class Config:
+        json_encoders = {bytes: lambda v: str("binary data")}
+
 
 @json_schema_type
 class ImageContentItem(_URLOrData):
diff --git a/llama_stack/providers/utils/telemetry/trace_protocol.py b/llama_stack/providers/utils/telemetry/trace_protocol.py
index 7d1714576..31897c0ae 100644
--- a/llama_stack/providers/utils/telemetry/trace_protocol.py
+++ b/llama_stack/providers/utils/telemetry/trace_protocol.py
@@ -23,12 +23,7 @@ def serialize_value(value: Any) -> Any:
     elif hasattr(value, "_name_"):
         return value._name_
     elif isinstance(value, BaseModel):
-        try:
-            return value.model_dump_json()
-        except Exception as e:
-            # We cannot serialize the binary bytes data,
-            # So we return the model dump as a string for logging
-            return str(value.model_dump())
+        return value.model_dump_json()
     elif isinstance(value, (list, tuple, set)):
         return [serialize_value(item) for item in value]
     elif isinstance(value, dict):