Janus Playground Explores User-Involved AI Agent Permissions

Natalie Grace Brigham, Eugene Bagdasarian, Tadayoshi Kohno, Franziska Roesner· July 3, 2026 View original

Summary

Janus is a new playground system designed to implement and evaluate various user-involved permission management designs for AI agents. It demonstrates that user input is crucial for privacy and security, AI augmentation can reduce cognitive load, and system design must account for user fatigue.

As AI agents gain autonomy in executing tool calls on behalf of users, effective permission management becomes a critical concern. This research introduces Janus, a novel playground system specifically designed to explore and evaluate different approaches to user involvement in agentic permission management. Janus comprises Janus-Core, a modular agentic system supporting diverse permission designs, and Janus-Harness, an automated evaluation framework. Grounded in a conceptual model that identifies key design axes for user involvement, the researchers implemented six distinct permission assistants. These assistants were evaluated across three scenarios and with three synthetic user responders. The findings highlight that direct user input is essential for strengthening privacy and security in agentic systems. Furthermore, the study shows that AI augmentation can help reduce the cognitive load on users when making permission decisions. However, it also emphasizes the importance of accounting for realistic user behavior, such as "permission fatigue," in system design. The conclusion is that no single permission design is universally optimal, necessitating a more principled and context-sensitive approach to deploying permission assistants. Janus is publicly available to foster further research in this vital area.

Why it matters

For professionals developing or deploying AI agents, understanding how to effectively manage user permissions is paramount for building secure, trustworthy, and user-friendly systems, especially as agents gain more autonomy.

How to implement this in your domain

  1. 1Integrate user-involvement mechanisms into AI agent permission management workflows from the initial design phase.
  2. 2Experiment with AI augmentation for permission decisions to balance security with user cognitive load.
  3. 3Design permission interfaces that minimize "permission fatigue" by being context-aware and offering sensible defaults.
  4. 4Utilize frameworks like Janus to systematically evaluate different permission management strategies for specific agentic applications.

Who benefits

Software DevelopmentCybersecurityAI/ML EngineeringEnterprise SaaSConsumer Technology

Key takeaways

  • User involvement is critical for privacy and security in autonomous AI agent permission management.
  • AI augmentation can reduce user cognitive load in permission decisions.
  • System design must account for user behaviors like "permission fatigue."
  • A context-sensitive approach is needed, as no single permission design is universally optimal.

Original post by Natalie Grace Brigham, Eugene Bagdasarian, Tadayoshi Kohno, Franziska Roesner

"arXiv:2607.01510v1 Announce Type: new Abstract: AI agents that autonomously execute tool calls on a user's behalf raise pressing questions about permission management: what role could users play, and what role should they play? Despite many proposed approaches, the user's role in…"

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Originally posted by Natalie Grace Brigham, Eugene Bagdasarian, Tadayoshi Kohno, Franziska Roesner on X · view source

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