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cs.CR2026
ToolRosetta: Surface-Form Invariance of Tool-Call Guards
Hasan Demirkiran, Jens Ernstberger
Step-level guards for tool-using agents are evaluated on tidy JSON tool calls, but deployed coding agents act through execute_bash and execute_code tools whose payloads are strings…
cs.CR2026
Language Is a Security Surface for Agent Guards
Hasan Demirkiran, Jens Ernstberger
Step-level guards decide, before each tool call, whether an agent's next action is safe given the user's request and the trajectory so far. Users write those requests in many langu…