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Enterprise-MCP-Service-Bus/docs/adr/ADR-002-enforcement-at-the-gateway.en-us.md
2026-09-14 14:54:28 -03:00

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ADR-002: MCP Gateway as the sole PEP

Status: Accepted. Source: this ADR is the canonical record of this decision. For implementation and validation context, see RI/docs/AS-BUILT.md and, where applicable, the relevant contract in RI/docs/interfaces/.

Context

Where to apply enforcement.

Decision

MCP Gateway is the sole PEP; it never delegates the ALLOW/DENY decision to the LLM.

Alternatives Considered

Distributed enforcement in each MCP Server.

Consequences

Centralizes EP-05; domain servers (EP-06) do not reimplement authz.