MCP Security: Enforcing Policies Outside the Agent (2026)

MCP servers may operate with configured credentials and optional authorization, creating risks such as excessive agent permissions, confused-deputy access, shared-token exposure, missing user-level audit trails, and permission drift. The proposed approach is to enforce authentication, least-privilege policies, role-based access control, workspace and tool isolation, and logging through an independent centralized control plane that checks each request before it reaches an MCP server. Runtime identity passthrough using OAuth, SAML, OIDC, and emerging Enterprise-Managed Authorization mechanisms can allow requests to run under the actual user’s current permissions rather than a broad shared service account. Centralized enforcement also supports query-level audit records, SIEM integration, and compliance requirements such as SOC 2, ISO 27001, GDPR, and CCPA. The discussion contrasts the ongoing costs and maintenance demands of building these controls internally with managed platforms such as CData Connect AI, which positions itself as a gateway for governing agent access to enterprise data.

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