Bedrock Mistral not working as agent

[WaterKnight1998]

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

from langchain import hub
from langchain_community.chat_models.bedrock import BedrockChat
from langchain.agents import AgentExecutor, create_structured_chat_agent

from langchain_community.tools.tavily_search import TavilySearchResults

prompt = hub.pull("hwchase17/structured-chat-agent")

llm_model = BedrockChat(
        region_name="us-east-1",
        model_id="mistral.mistral-7b-instruct-v0:2",
    )

tools = [TavilySearchResults()]
agent = create_structured_chat_agent(llm_model, tools, prompt)

agent_executor = AgentExecutor(
    agent=agent,
    tools=tools,
    verbose=True,
    handle_parsing_errors=True,
    return_intermediate_steps=True,
)

agent.invoke({"input": "What is the president of USA?"})

Error Message and Stack Trace (if applicable)

Exception: ValueError: Error raised by bedrock service: An error occurred (ValidationException) when calling the InvokeModelWithResponseStream operation: Malformed input request: #: extraneous key [stop_sequences] is not permitted, please reformat your input and try again.

Description

• I am using Mistral model of AWS Bedrock as an agent
• It doesn't work

System Info

System Information

OS: Darwin
OS Version: Darwin Kernel Version 23.3.0: Wed Dec 20 21:31:00 PST 2023; root:xnu-10002.81.5~7/RELEASE_ARM64_T6020
Python Version: 3.10.0 (default, Nov 11 2023, 18:46:15) [Clang 15.0.0 (clang-1500.0.40.1)]

Package Information

langchain_core: 0.1.34
langchain: 0.1.13
langchain_community: 0.0.29
langsmith: 0.1.33
langchain_google_vertexai: 0.1.2
langchain_openai: 0.0.8
langchain_text_splitters: 0.0.1
langchainhub: 0.1.15

Packages not installed (Not Necessarily a Problem)

The following packages were not found:

langgraph
langserve

[BasemRizk]

Hello , I have the same issue , do you find a solution ?

[hasansustcse13]

You can try this
agent = create_structured_chat_agent(llm_model, tools, prompt, stop_sequence=False)