自然言語クエリを使用して AgentCore ゲートウェイ内のツールを検索する

import requests
import json

def search_tools(gateway_url, access_token, query):
    headers = {
        "Content-Type": "application/json",
        "Authorization": f"Bearer {access_token}"
    }

    payload = {
        "jsonrpc": "2.0",
        "id": "search-tools-request",
        "method": "tools/call",
        "params": {
            "name": "x_amz_bedrock_agentcore_search",
            "arguments": {
                "query": query
            }
        }
    }

    response = requests.post(gateway_url, headers=headers, json=payload)
    return response.json()

# Example usage
gateway_url = "https://${GatewayEndpoint}/mcp" # Replace with your actual gateway endpoint
access_token = "${AccessToken}" # Replace with your actual access token
results = search_tools(gateway_url, access_token, "find order information")
print(json.dumps(results, indent=2))

from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client
import asyncio

async def execute_mcp(
    url,
    token,
    tool_params,
    headers=None
):
    default_headers = {
        "Authorization": f"Bearer {token}"
    }
    headers = {**default_headers, **(headers or {})}

    async with streamablehttp_client(
       url=url,
       headers=headers,
    ) as (
        read_stream,
        write_stream,
        callA,
    ):
        async with ClientSession(read_stream, write_stream) as session:
            # 1. Perform initialization handshake
            print("Initializing MCP...")
            _init_response = await session.initialize()
            print(f"MCP Server Initialize successful! - {_init_response}")

            # 2. Call specific tool
            print(f"Calling tool: {tool_params['name']}")
            tool_response = await session.call_tool(
                name=tool_params['name'],
                arguments=tool_params['arguments']
            )
            print(f"Tool response: {tool_response}")
            return tool_response

async def main():
    url = "https://${GatewayEndpoint}/mcp"
    token = "your_bearer_token_here"
    tool_params = {
        "name": "x_amz_bedrock_agentcore_search",
        "arguments": {
            "query": "How do I find order details?"
        }
    }
    await execute_mcp(
        url=url,
        token=token,
        tool_params=tool_params
    )


if __name__ == "__main__":
    asyncio.run(main())

from strands.tools.mcp.mcp_client import MCPClient
from mcp.client.streamable_http import streamablehttp_client

def create_streamable_http_transport(mcp_url: str, access_token: str):
    return streamablehttp_client(mcp_url, headers={"Authorization": f"Bearer {access_token}"})

def get_full_tools_list(client):
    """
    List tools w/ support for pagination
    """
    more_tools = True
    tools = []
    pagination_token = None
    while more_tools:
        tmp_tools = client.list_tools_sync(pagination_token=pagination_token)
        tools.extend(tmp_tools)
        if tmp_tools.pagination_token is None:
            more_tools = False
        else:
            more_tools = True
            pagination_token = tmp_tools.pagination_token
    return tools

def run_agent(mcp_url: str, access_token: str):
    mcp_client = MCPClient(lambda: create_streamable_http_transport(mcp_url, access_token))

    with mcp_client:
        tools = get_full_tools_list(mcp_client)
        print(f"Found the following tools: {[tool.tool_name for tool in tools]}")
        result = mcp_client.call_tool_sync(
            tool_use_id="tool-123",  # A unique ID for the tool call
            name="x_amz_bedrock_agentcore_search",  # The name of the tool to invoke
            arguments={"query": "find order information"}  # A dictionary of arguments for the tool
        )
        print(result)

url = {gatewayUrl}
token = {AccessToken}
run_agent(url, token)

import asyncio

from langchain_mcp_adapters.client import MultiServerMCPClient
from langgraph.prebuilt import create_react_agent

url = ""
headers = {}

def filter_search_tool(
):
    mcp_client = MultiServerMCPClient(
        {
            "agent": {
                "transport": "streamable_http",
                "url": url,
                "headers": headers,
            }
        }
    )
    tools = asyncio.run(mcp_client.get_tools())
    builtin_search_tool = []
    for tool in tools:
        if tool.name == "x_amz_bedrock_agentcore_search":
            builtin_search_tool.append(tool)
    return builtin_search_tool

def execute_agent(
    user_prompt,
    model_id,
    region,
    tools
):
    model = ChatBedrock(model_id=model_id, region_name=region)

    agent = create_react_agent(model, filter_search_tool())
    _response = asyncio.run(agent.ainvoke({
        "messages": user_prompt
    }))

    _response = _response.get('messages', {})[1].content
    print(
        f"Invoke Langchain Agents Response"
        f"Response - \n{_response}\n"
    )
    return _response