46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
from typing import Any, Dict, Optional
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from letta.constants import MCP_TOOL_TAG_NAME_PREFIX
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from letta.otel.tracing import trace_method
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from letta.schemas.agent import AgentState
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from letta.schemas.sandbox_config import SandboxConfig
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from letta.schemas.tool import Tool
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from letta.schemas.tool_execution_result import ToolExecutionResult
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from letta.schemas.user import User
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from letta.services.mcp_manager import MCPManager
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from letta.services.tool_executor.tool_executor_base import ToolExecutor
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class ExternalMCPToolExecutor(ToolExecutor):
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"""Executor for external MCP tools."""
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@trace_method
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async def execute(
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self,
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function_name: str,
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function_args: dict,
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tool: Tool,
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actor: User,
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agent_state: Optional[AgentState] = None,
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sandbox_config: Optional[SandboxConfig] = None,
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sandbox_env_vars: Optional[Dict[str, Any]] = None,
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) -> ToolExecutionResult:
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pass
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mcp_server_tag = [tag for tag in tool.tags if tag.startswith(f"{MCP_TOOL_TAG_NAME_PREFIX}:")]
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if not mcp_server_tag:
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raise ValueError(f"Tool {tool.name} does not have a valid MCP server tag")
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mcp_server_name = mcp_server_tag[0].split(":")[1]
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mcp_manager = MCPManager()
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# TODO: may need to have better client connection management
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function_response, success = await mcp_manager.execute_mcp_server_tool(
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mcp_server_name=mcp_server_name, tool_name=function_name, tool_args=function_args, actor=actor
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)
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return ToolExecutionResult(
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status="success" if success else "error",
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func_return=function_response,
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)
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