ValidationError while using RequestsGetTool(allow_dangerous_requests=True)

[GivenFLY]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

The example code:

from langchain_community.tools import RequestsGetTool

requests_tool = RequestsGetTool(allow_dangerous_requests=True)

Error Message and Stack Trace (if applicable)

---------------------------------------------------------------------------
ValidationError                           Traceback (most recent call last)
Cell In[2], line 3
      1 from langchain_community.tools import RequestsGetTool
----> 3 requests_tool = RequestsGetTool(allow_dangerous_requests=True)

File ~\AppData\Local\pypoetry\Cache\virtualenvs\deep-research-poc-JwCdMXLA-py3.12\Lib\site-packages\langchain_community\tools\requests\tool.py:47, in BaseRequestsTool.__init__(self, **kwargs)
     36 if not kwargs.get("allow_dangerous_requests", False):
     37     raise ValueError(
     38         "You must set allow_dangerous_requests to True to use this tool. "
     39         "Requests can be dangerous and can lead to security vulnerabilities. "
   (...)     45         "further security information."
     46     )
---> 47 super().__init__(**kwargs)

File ~\AppData\Local\pypoetry\Cache\virtualenvs\deep-research-poc-JwCdMXLA-py3.12\Lib\site-packages\langchain_core\tools\base.py:440, in BaseTool.__init__(self, **kwargs)
    435     msg = (
    436         "args_schema must be a subclass of pydantic BaseModel or "
    437         f"a JSON schema dict. Got: {kwargs['args_schema']}."
    438     )
    439     raise TypeError(msg)
--> 440 super().__init__(**kwargs)

File ~\AppData\Local\pypoetry\Cache\virtualenvs\deep-research-poc-JwCdMXLA-py3.12\Lib\site-packages\langchain_core\load\serializable.py:125, in Serializable.__init__(self, *args, **kwargs)
    123 def __init__(self, *args: Any, **kwargs: Any) -> None:
    124     """"""
--> 125     super().__init__(*args, **kwargs)

File ~\AppData\Local\pypoetry\Cache\virtualenvs\deep-research-poc-JwCdMXLA-py3.12\Lib\site-packages\pydantic\main.py:214, in BaseModel.__init__(self, **data)
    212 # `__tracebackhide__` tells pytest and some other tools to omit this function from tracebacks
    213 __tracebackhide__ = True
--> 214 validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
    215 if self is not validated_self:
    216     warnings.warn(
    217         'A custom validator is returning a value other than `self`.\n'
    218         "Returning anything other than `self` from a top level model validator isn't supported when validating via `__init__`.\n"
    219         'See the `model_validator` docs (https://docs.pydantic.dev/latest/concepts/validators/#model-validators) for more details.',
    220         stacklevel=2,
    221     )

ValidationError: 1 validation error for RequestsGetTool
requests_wrapper
  Field required [type=missing, input_value={'allow_dangerous_requests': True}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.10/v/missing

Description

I have provided an expampe code and an error, I think there is no need for more context

System Info

System Information
------------------
> OS:  Windows
> OS Version:  10.0.26100
> Python Version:  3.12.2 (tags/v3.12.2:6abddd9, Feb  6 2024, 21:26:36) [MSC v.1937 64 bit (AMD64)]

Package Information
-------------------
> langchain_core: 0.3.48
> langchain: 0.3.21
> langchain_community: 0.3.20
> langsmith: 0.3.18
> langchain_anthropic: 0.3.10
> langchain_openai: 0.3.10
> langchain_text_splitters: 0.3.7
> langgraph_sdk: 0.1.59

Optional packages not installed
-------------------------------
> langserve

Other Dependencies
------------------
> aiohttp<4.0.0,>=3.8.3: Installed. No version info available.
> anthropic<1,>=0.49.0: Installed. No version info available.
> async-timeout<5.0.0,>=4.0.0;: Installed. No version info available.
> dataclasses-json<0.7,>=0.5.7: Installed. No version info available.
> httpx: 0.28.1
> httpx-sse<1.0.0,>=0.4.0: Installed. No version info available.
> jsonpatch<2.0,>=1.33: Installed. No version info available.
> langchain-anthropic;: Installed. No version info available.
> langchain-aws;: Installed. No version info available.
> langchain-azure-ai;: Installed. No version info available.
> langchain-cohere;: Installed. No version info available.
> langchain-community;: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.45: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.48: Installed. No version info available.
> langchain-deepseek;: Installed. No version info available.
> langchain-fireworks;: Installed. No version info available.
> langchain-google-genai;: Installed. No version info available.
> langchain-google-vertexai;: Installed. No version info available.
> langchain-groq;: Installed. No version info available.
> langchain-huggingface;: Installed. No version info available.
> langchain-mistralai;: Installed. No version info available.
> langchain-ollama;: Installed. No version info available.
> langchain-openai;: Installed. No version info available.
> langchain-text-splitters<1.0.0,>=0.3.7: Installed. No version info available.
> langchain-together;: Installed. No version info available.
> langchain-xai;: Installed. No version info available.
> langchain<1.0.0,>=0.3.21: Installed. No version info available.
> langsmith-pyo3: Installed. No version info available.
> langsmith<0.4,>=0.1.125: Installed. No version info available.
> langsmith<0.4,>=0.1.17: Installed. No version info available.
> numpy<3,>=1.26.2: Installed. No version info available.
> openai-agents: Installed. No version info available.
> openai<2.0.0,>=1.68.2: Installed. No version info available.
> opentelemetry-api: Installed. No version info available.
> opentelemetry-exporter-otlp-proto-http: Installed. No version info available.
> opentelemetry-sdk: Installed. No version info available.
> orjson: 3.10.16
> packaging: 24.2
> packaging<25,>=23.2: Installed. No version info available.
> pydantic: 2.10.6
> pydantic-settings<3.0.0,>=2.4.0: Installed. No version info available.
> pydantic<3.0.0,>=2.5.2;: Installed. No version info available.
> pydantic<3.0.0,>=2.7.4: Installed. No version info available.
> pydantic<3.0.0,>=2.7.4;: Installed. No version info available.
> pytest: Installed. No version info available.
> PyYAML>=5.3: Installed. No version info available.
> requests: 2.32.3
> requests-toolbelt: 1.0.0
> requests<3,>=2: Installed. No version info available.
> rich: Installed. No version info available.
> SQLAlchemy<3,>=1.4: Installed. No version info available.
> tenacity!=8.4.0,<10,>=8.1.0: Installed. No version info available.
> tenacity!=8.4.0,<10.0.0,>=8.1.0: Installed. No version info available.
> tiktoken<1,>=0.7: Installed. No version info available.
> typing-extensions>=4.7: Installed. No version info available.
> zstandard: 0.23.0

[ccurme]

All requests tools include requests_wrapper as a required parameter: https://python.langchain.com/api_reference/community/tools/langchain_community.tools.requests.tool.BaseRequestsTool.html

Docs here demonstrate how to initialize it and pass it in.

Are there docs that demonstrate initialization without this parameter?

[GivenFLY]

Oh, I get it now — I didn’t realize requests_wrapper is required. I’m used to seeing required arguments listed at the top of the docs, and here it’s further down the page:

https://python.langchain.com/api_reference/community/tools/langchain_community.tools.requests.tool.RequestsGetTool.html#langchain_community.tools.requests.tool.RequestsGetTool.requests_wrapper

Thanks for the help! Maybe it would be useful to mention that at the top or show a clearer error if requests_wrapper is missing?

[eyurtsev]

We can't do much about the error message -- it's the pydantic default unfortunately

[GivenFLY]

Btw, if anyone runs into the same error in the future, here’s a quick way to make it work:

from langchain_community.utilities import TextRequestsWrapper  # or JsonRequestsWrapper or any other wrapper you need
from langchain_community.tools import RequestsGetTool

wrapper = TextRequestsWrapper()
requests_tool = RequestsGetTool(
    requests_wrapper=wrapper,
    allow_dangerous_requests=True
)

[dosubot]

Hi, @GivenFLY. I'm Dosu, and I'm helping the LangChain team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• You reported a ValidationError with RequestsGetTool using allow_dangerous_requests=True.
• ccurme clarified the need for the requests_wrapper parameter, which was not clear in the documentation.
• You acknowledged the oversight and suggested improving documentation or error messaging.
• eyurtsev noted limitations in modifying default pydantic error messages.
• You provided a code snippet to help others correctly initialize the tool.

Next Steps:

• Please confirm if this issue is still relevant to the latest version of LangChain by commenting here.
• If no updates are provided, the issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!