A security vulnerability exists in how AI tools handle untrusted input, specifically within the `inputSchema` field of tool definitions. While developers often hash and verify the tool's main description to prevent malicious instructions, they overlook the `description`, `title`, and `example` fields within the JSON Schema itself. These fields can be manipulated to inject new instructions that the model will read, bypassing the description-based allowlist. The recommended fix is to strip or overwrite these prose fields at every level of the schema before exposing it to the model, ensuring only the structural schema is used for validation. AI
IMPACT This vulnerability could allow malicious actors to inject unintended instructions into AI models through tool definitions, potentially leading to security breaches or unexpected behavior.
RANK_REASON The item discusses a specific technical vulnerability and mitigation strategy for AI tool definitions, not a new product release or major industry event.
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