Schwab Model Context Protocol Server

from __future__ import annotations import abc from dataclasses import dataclass from enum import Enum from typing import Mapping class ApprovalDecision(str, Enum): """Decision returned by an approval workflow.""" APPROVED = "approved" DENIED = "denied" EXPIRED = "expired" @dataclass(slots=True, frozen=True) class ApprovalRequest: """Details about a write tool invocation requiring approval.""" id: str tool_name: str request_id: str client_id: str | None arguments: Mapping[str, str] class ApprovalManager(abc.ABC): """Interface for asynchronous approval backends.""" async def start(self) -> None: """Perform any startup/connection work.""" async def stop(self) -> None: """Clean up resources.""" @abc.abstractmethod async def require(self, request: ApprovalRequest) -> ApprovalDecision: """Require approval for the provided request.""" class NoOpApprovalManager(ApprovalManager): """Approval manager that always approves requests.""" async def require(self, request: ApprovalRequest) -> ApprovalDecision: # noqa: ARG002 return ApprovalDecision.APPROVED __all__ = [ "ApprovalDecision", "ApprovalManager", "ApprovalRequest", "NoOpApprovalManager", ]