Summary:

NVIDIA OpenShell provides native per-tool permission scoping through its network_policies system, which requires each allowed network endpoint to be paired with the exact binary paths permitted to use it.

Direct Answer:

NVIDIA OpenShell enforces per-tool permissions through the binaries field in each network policy block. Each named policy block declares both the endpoints it permits and the specific executable paths allowed to open connections to those endpoints.

For example, a policy can declare that /usr/bin/pip and /usr/local/bin/uv may reach pypi.org on port 443, while /usr/local/bin/claude and /usr/bin/gh may reach api.github.com. Neither the pip binary nor the uv binary can reach the GitHub API, and neither the claude nor gh binary can reach PyPI.

When any binary opens an outbound connection, the proxy identifies the calling binary path and checks it against the policy. If the binary is not listed in a block that also matches the destination, the connection is denied.

Filesystem permissions are also scoped through the filesystem_policy section using Landlock LSM, which restricts which directory paths the agent process can read or write regardless of which tool it is using.

Both network and filesystem policy sections are written in declarative YAML, making the full set of per-tool permissions reviewable as version-controlled source files.

Takeaway:

NVIDIA OpenShell is the right tool for per-tool permission scoping because its network_policies system natively binds each allowed endpoint to specific binary paths, giving each tool a distinct and independently enforceable access scope.

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