[BUG]: LLMObs: `AttributeError: type object 'Tool' has no attribute 'run'` with pydantic-ai 0.4.4+

[akotsarelation]

Tracer Version(s)

3.10.3

Python Version(s)

Python 3.12.7

Pip Version(s)

pip 25.1.1

Bug Report

The application is crashing on LLMObs.enable() if pydantic-ai 0.4.4 or newer is installed.

Reproduction Code

1. Install ddtrace 3.10.3
2. Install pydantic-ai-slim 0.4.4 or newer (tested up until 0.4.9)
3. Execute the following code:

import pydantic_ai
from ddtrace.llmobs import LLMObs
LLMObs.enable()

Observe the following error:

  File "/some/path/lib/python3.12/site-packages/ddtrace/llmobs/_llmobs.py", line 518, in enable
    cls._patch_integrations()
  File "/some/path/lib/python3.12/site-packages/ddtrace/llmobs/_llmobs.py", line 732, in _patch_integrations
    patch(raise_errors=True, **integrations_to_patch)
  File "/some/path/lib/python3.12/site-packages/ddtrace/_monkey.py", line 387, in patch
    when_imported(module)(
  File "/some/path/lib/python3.12/site-packages/wrapt/importer.py", line 293, in register
    register_post_import_hook(hook, name)
  File "/some/path/lib/python3.12/site-packages/wrapt/importer.py", line 79, in register_post_import_hook
    hook(module)
  File "/some/path/lib/python3.12/site-packages/ddtrace/_monkey.py", line 275, in on_import
    imported_module.patch()
  File "/some/path/lib/python3.12/site-packages/ddtrace/contrib/internal/pydantic_ai/patch.py", line 55, in patch
    wrap(pydantic_ai, "tools.Tool.run", traced_tool_run(pydantic_ai))
  File "/some/path/lib/python3.12/site-packages/wrapt/patches.py", line 114, in wrap_function_wrapper
    return wrap_object(module, name, FunctionWrapper, (wrapper,))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/some/path/lib/python3.12/site-packages/wrapt/patches.py", line 60, in wrap_object
    (parent, attribute, original) = resolve_path(module, name)
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/some/path/lib/python3.12/site-packages/wrapt/patches.py", line 52, in resolve_path
    original = lookup_attribute(parent, attribute)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/some/path/lib/python3.12/site-packages/wrapt/patches.py", line 44, in lookup_attribute
    return getattr(parent, attribute)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'Tool' has no attribute 'run'

Error Logs

No response

Libraries in Use

aiohappyeyeballs==2.6.1
aiohttp==3.12.14
aiosignal==1.4.0
aiosqlite==0.20.0
alembic==1.13.3
annotated-types==0.7.0
anyio==4.9.0
asyncmy==0.2.10
attrs==25.3.0
black==25.1.0
boto3==1.39.15
botocore==1.39.15
bytecode==0.16.2
certifi==2025.7.14
cffi==1.17.1
charset-normalizer==3.4.2
click==8.2.1
colorama==0.4.6
coverage==7.10.1
cryptography==44.0.3
dapr==1.15.0
ddtrace==3.10.3
envier==0.6.1
eval_type_backport==0.2.2
fastapi==0.116.1
flake8==7.0.0
flake8-black==0.3.6
frozenlist==1.7.0
googleapis-common-protos==1.70.0
greenlet==3.2.3
griffe==1.9.0
grpcio==1.74.0
grpcio-status==1.74.0
h11==0.16.0
httpcore==1.0.9
httpx==0.28.1
idna==3.10
importlib_metadata==8.7.0
iniconfig==2.1.0
isort==6.0.1
jmespath==1.0.1
jsonschema==4.25.0
jsonschema-path==0.3.4
jsonschema-specifications==2025.4.1
lazy-object-proxy==1.11.0
logfire-api==4.0.0
Mako==1.3.10
MarkupSafe==3.0.2
mccabe==0.7.0
multidict==6.6.3
mypy==1.17.0
mypy_extensions==1.1.0
openapi-schema-validator==0.6.3
openapi-spec-validator==0.7.2
opentelemetry-api==1.35.0
packaging==25.0
pastel==0.2.1
pathable==0.4.4
pathspec==0.12.1
platformdirs==4.3.8
pluggy==1.6.0
poethepoet==0.36.0
propcache==0.3.2
protobuf==6.31.1
pycodestyle==2.11.1
pycparser==2.22
pydantic==2.11.7
pydantic-ai-slim==0.4.5
pydantic-graph==0.4.5
pydantic-settings==2.10.1
pydantic_core==2.33.2
pyflakes==3.2.0
Pygments==2.19.2
PyJWT==2.10.1
pytest==8.4.1
pytest-asyncio==0.26.0
pytest-cov==6.0.0
python-dateutil==2.9.0.post0
python-dotenv==1.1.1
PyYAML==6.0.2
referencing==0.36.2
requests==2.32.4
rfc3339-validator==0.1.4
rpds-py==0.26.0
s3transfer==0.13.1
six==1.17.0
sniffio==1.3.1
SQLAlchemy==2.0.41
starlette==0.47.2
structlog==24.4.0
types-protobuf==6.30.2.20250703
types-PyMySQL==1.1.0.20250711
types-python-dateutil==2.9.0.20250708
types-PyYAML==6.0.12.20250516
types-requests==2.32.4.20250611
types-setuptools==80.9.0.20250529
types-six==1.17.0.20250515
types-ujson==5.10.0.20250326
typing-inspection==0.4.1
typing_extensions==4.14.1
urllib3==2.5.0
uvicorn==0.35.0
wrapt==1.17.2
xmltodict==0.14.2
yarl==1.20.1
zipp==3.23.0

Operating System

Darwin Kernel Version 24.5.0

[DouweM]

Looks like https://github.com/DataDog/dd-trace-py/blob/main/ddtrace/contrib/internal/pydantic_ai/patch.py needs updating after pydantic/pydantic-ai#2024 was released which changes how tools are executed. I work on Pydantic AI, let me know if you need any guidance.

[ncybul]

Thanks for bringing this to our attention! We are working on a fix in this PR and will keep this thread updated once we can get this reviewed and released.