Tenuo
Tenuo is an open-source authorization layer for AI agent tools. It provides task-scoped permissions by issuing cryptographic warrants that constrain which tools an agent may call and which arguments are acceptable. Each tool invocation is checked at the argument level, so authorization decisions are made per call rather than at a coarse session or agent level. The project is designed to prevent privilege escalation as authority is delegated across multiple agents or steps. Authority is traced across delegation chains: when a parent agent delegates a task to a child agent, the child receives only a constrained subset of the parent's warrants. Tenuo can produce signed evidence of what was allowed or denied, supporting auditability and post-hoc analysis of agent behavior. The project is hosted on GitHub under the tenuo-ai organization and is positioned as an open-source building block for secure AI agent systems.
- Category
- AI Agents
- Pricing
- Open Source
Problem solved
AI agents can invoke external tools with broad or inherited permissions, making it difficult to enforce least privilege and audit what actions were actually authorized. Tenuo addresses this by checking each tool call at the argument level and tracing authority across delegation chains, preventing privilege escalation and generating signed evidence of allow or deny decisions.
Use cases
- Enforce argument-level authorization for AI agent tool calls
- Trace and constrain authority across multi-agent delegation chains
- Prevent privilege escalation when agents delegate tasks to sub-agents
- Generate signed audit evidence of allowed and denied tool invocations
- Apply task-scoped permissions to autonomous agent workflows
- Integrate per-call authorization into agent frameworks and tool routers
Audience
- Developers
- ML Engineers
- Enterprise
Pros
- Argument-level authorization checks for each agent tool call
- Traces authority across delegation chains to prevent privilege escalation
- Produces signed evidence of allow and deny decisions for auditing
- Open-source and designed for integration into agent systems
- Task-scoped warrants provide fine-grained control over agent permissions
Cons
- Requires integration effort into existing agent frameworks or tool routers
- Cryptographic warrant and delegation concepts introduce a learning curve
- Ecosystem and documentation may be less mature than established authorization platforms
- No managed SaaS offering is indicated in the provided metadata
Official website: https://github.com/tenuo-ai/tenuo
Canonical LambdaBase page: https://www.lambdabase.com/tools/tenuo