The author discovered a security vulnerability in their own data governance layer, Warden, which sits in front of an MCP server. The bug allowed a support role, which should not have access to billing tier information, to indirectly infer it by using the tier as a query filter. Standard security scanners, which analyze tool manifests, failed to detect this runtime issue. To address this, the author developed a new tool called Siege, which acts as an attacker to test the live server's access control by simulating different user roles and comparing their data access against a baseline of the most permissive identity. AI
IMPACT This development introduces a new method for testing AI system security, potentially improving the robustness of data governance layers.
RANK_REASON The item describes the creation of a new security tool to address a specific type of vulnerability.
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