MCP Server Security and Governance Assessment

Teams are shipping Model Context Protocol servers faster than they can review them. A tool definition is a published instruction set. An endpoint without authentication is a public one. Most MCP surfaces expose both, and the exposure is usually discovered by someone outside the organization. This assessment examines one MCP server or agent API surface of up to 10 tool endpoints and returns a written report. It covers five areas: authentication and authorization posture, including what is reachable without credentials; tool-definition exposure, and what published schemas reveal about internal systems; input validation and fail-closed behavior under malformed or hostile input; prompt-injection surface, where untrusted content reaches an instruction path; and provenance and audit-trail integrity, meaning whether you can demonstrate after the fact what an agent actually did. Each finding states the observed behavior, why it matters, and a specific remediation. Findings are ranked by exploitability rather than by scanner severity. One re-test of remediated findings is included within 30 days of delivery. This assessment relates to MCP servers and agent APIs deployed on AWS services, including Amazon Bedrock and Amazon Bedrock AgentCore, AWS Lambda, Amazon API Gateway, Amazon ECS, AWS Fargate, and Amazon EKS. It also applies to AI agent and tool products listed in AWS Marketplace, whose sellers must be able to describe their own security posture. Bonis Systems LLC is a Wyoming company operating MCP endpoints in production under continuous third-party probing, on infrastructure built around fail-closed gating, hash-chained event records, and post-quantum signatures. This assessment applies that operating experience to your surface.