Lesson 967 of 2116
Agent Tool Permission Design: Least Privilege for Autonomous Systems
An agent with broad tool access has a broad blast radius when it goes wrong. Designing tool permissions following least-privilege principles is the single most important agent safety control.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2tool permissions
- 3least privilege
- 4blast radius
Concept cluster
Terms to connect while reading
Section 1
The premise
Tool permission design is the agent equivalent of IAM — get it wrong and the blast radius is enormous.
What AI does well here
- Scope tool capabilities to the minimum required for each task
- Implement per-action confirmation for high-impact tools (send email, charge payment, delete data)
- Use ephemeral credentials with short TTLs scoped to the agent's task
- Maintain audit logs of every tool invocation with the prompt context that triggered it
What AI cannot do
- Substitute for understanding what the agent is actually authorized to do
- Replace the human review of high-stakes actions
- Make permissions prevent every misuse — they reduce risk, they don't eliminate it
Key terms in this lesson
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