Learn Why Agent Tool Boundaries Fail by Building a Tiny Permission Harness

This article demonstrates how to build a tiny permission harness to test agent tool boundaries. The harness gives a model two tools, one forbidden action, and three test prompts to see if the model keeps itself inside the lines. The result shows that a stated rule is not enough to prevent the model from taking a forbidden action. Engineers should be aware that agent tool boundaries can fail, and a more robust solution is needed to prevent this.