MCP Server Security for Enterprise AI Agents

LLM prompt injection defense in production is an architecture problem, not a prompt problem. Agents never receive a raw admin token or write their own queries. They call named, typed, permission-scoped tools through an MCP server, every state-changing action is validated against policy before execution, and anything above a configured threshold requires a human approver. We run a RAG pipeline security audit checklist across tool scope, retrieved-content trust boundaries, and audit logging. The same AI architecture audit checklist is what we hand a client evaluating someone else's design.

The main ones: over-broad tool scope (an agent that can do more than intended), prompt injection (untrusted content steering the agent), the confused-deputy problem (the agent using its privileges on an attacker's behalf), secrets leakage, and missing audit trails. MCP security engineering closes each of these deliberately.

Layered: keep instructions and untrusted data separated, treat all tool and document output as untrusted, require human approval for state-changing or irreversible actions, constrain tools to least privilege so a hijacked agent can't do much, and log everything. There's no single silver bullet, so we defend in depth.

Yes. We run a security assessment against your existing MCP servers (tool scoping, auth, injection surface, secrets handling, and audit coverage) and deliver a prioritized remediation plan plus the hardening work itself. You don't have to have used us to build them.

We map controls to the frameworks you answer to (SOC 2, ISO 27001, and sector rules like HIPAA or PCI DSS), and the audit logging and access controls are built to produce the evidence your auditors ask for. Threat models and control matrices ship with the work.

Yes. MCP servers run inside your VPC with your SSO/RBAC and secrets management. No data egress, and the code, threat models, and runbooks transfer to your team.

Two common shapes. A fixed-scope Security Assessment of your existing MCP servers (tool scoping, injection surface, secrets handling, and audit coverage) that delivers a prioritized remediation plan, or a hardening engagement that implements the fixes. Both are fixed-scope with defined deliverables and typical timelines of a few weeks; larger programs scale from there. We scope against your actual server inventory, not a rate card.