diff --git a/python/instrumentation/openinference-instrumentation-openai-agents/src/openinference/instrumentation/openai_agents/_processor.py b/python/instrumentation/openinference-instrumentation-openai-agents/src/openinference/instrumentation/openai_agents/_processor.py
index 60a56aa706..47406aa018 100644
--- a/python/instrumentation/openinference-instrumentation-openai-agents/src/openinference/instrumentation/openai_agents/_processor.py
+++ b/python/instrumentation/openinference-instrumentation-openai-agents/src/openinference/instrumentation/openai_agents/_processor.py
@@ -350,7 +350,23 @@ def _get_attributes_from_response_custom_tool_call_output_param(
     if (call_id := obj.get("call_id")) is not None:
         yield f"{prefix}{MessageAttributes.MESSAGE_TOOL_CALL_ID}", call_id
     if (output := obj.get("output")) is not None:
-        yield f"{prefix}{MessageAttributes.MESSAGE_CONTENT}", output
+        if isinstance(output, str):
+            yield f"{prefix}{MESSAGE_CONTENT}", output
+        elif isinstance(output, list):
+            for i, item in enumerate(output):
+                if item["type"] == "input_text":
+                    yield (
+                        f"{prefix}{MESSAGE_CONTENTS}.{i}.{MESSAGE_CONTENT_TEXT}",
+                        item["text"] or "",
+                    )
+                elif item["type"] == "input_image":
+                    # TODO: handle the input image type for the tool input
+                    pass
+                elif item["type"] == "input_file":
+                    # TODO: handle the input file type for the tool input
+                    pass
+                elif TYPE_CHECKING:
+                    assert_never(item["type"])
 
 
 def _get_attributes_from_function_call_output(
@@ -359,7 +375,24 @@ def _get_attributes_from_function_call_output(
 ) -> Iterator[tuple[str, AttributeValue]]:
     yield f"{prefix}{MESSAGE_ROLE}", "tool"
     yield f"{prefix}{MESSAGE_TOOL_CALL_ID}", obj["call_id"]
-    yield f"{prefix}{MESSAGE_CONTENT}", obj["output"]
+    if (output := obj.get("output")) is not None:
+        if isinstance(output, str):
+            yield f"{prefix}{MESSAGE_CONTENT}", output
+        elif isinstance(output, list):
+            for i, item in enumerate(output):
+                if item["type"] == "input_text":
+                    yield (
+                        f"{prefix}{MESSAGE_CONTENTS}.{i}.{MESSAGE_CONTENT_TEXT}",
+                        item["text"] or "",
+                    )
+                elif item["type"] == "input_image":
+                    # TODO: handle the input image type for the tool input
+                    pass
+                elif item["type"] == "input_file":
+                    # TODO: handle the input file type for the tool input
+                    pass
+                elif TYPE_CHECKING:
+                    assert_never(item["type"])
 
 
 def _get_attributes_from_generation_span_data(
diff --git a/python/instrumentation/openinference-instrumentation-openai-agents/tests/test_span_attribute_helpers.py b/python/instrumentation/openinference-instrumentation-openai-agents/tests/test_span_attribute_helpers.py
index 983b8b28ce..db9fd38d0f 100644
--- a/python/instrumentation/openinference-instrumentation-openai-agents/tests/test_span_attribute_helpers.py
+++ b/python/instrumentation/openinference-instrumentation-openai-agents/tests/test_span_attribute_helpers.py
@@ -409,8 +409,8 @@ def test_get_attributes_from_response_function_tool_call_param(
                 "output": "",
             },
             {
-                "message.content": "",
                 "message.role": "tool",
+                "message.content": "",
                 "message.tool_call_id": "123",
             },
             id="empty_output",
@@ -421,12 +421,23 @@ def test_get_attributes_from_response_function_tool_call_param(
                 "output": None,
             },
             {
-                "message.content": None,
                 "message.role": "tool",
                 "message.tool_call_id": "123",
             },
             id="none_output",
         ),
+        pytest.param(
+            {
+                "call_id": "123",
+                "output": [{"type": "input_text", "text": "result"}],
+            },
+            {
+                "message.role": "tool",
+                "message.contents.0.message_content.text": "result",
+                "message.tool_call_id": "123",
+            },
+            id="functional_call_output",
+        ),
     ],
 )
 def test_get_attributes_from_function_call_output(