Each Model Context Protocol (MCP) tool invocation on Amazon Quick is an access event that can require defense-in-depth authorization at the tool and parameter level, in addition to a valid token, because a single misconfigured permission can bypass access requirements organizations might need for compliance. The post implements a multi-gate authorization pattern that evaluates OpenID Connect (OIDC) JSON Web Token (JWT) claims in sequence, enforcing role-based and attribute-based access control on each invocation, with controls configured from group-based permissions to parameter-level attribute checks. Microsoft Entra ID serves as the identity provider. When MCP tools connect to Amazon Quick, a valid single sign-on (SSO) confirms who the caller is but not what they should be allowed to do; authorization turns a verified identity into enforceable rules about what each caller can reach. MCP is an open protocol connecting applications to internal tools, databases, and APIs, reducing the need for custom integrations, but once tools reach sensitive data, a valid SSO token is no longer enough, and a single over-broad token can reach tools and data beyond the caller's role. The interceptor processes OIDC JWT claims through four gates: MFA, geographic restriction, group-to-role mapping, and tool-level permission checks. The walkthrough configures Microsoft Entra ID applications, claims, and policies, connects Amazon Quick to an existing Amazon Bedrock AgentCore Gateway providing the HTTP endpoint and JWT validation layer, and validates allow