What
Evaluation runs that hand Claude a Bash or PowerShell tool now build a sandbox first and deny access to a long list of credential locations (AWS, GCP, Azure, Docker, Kubernetes, SSH, Kerberos, Maven, Gradle, SBT, npm, pip and more). If the machine has no sandbox backend, or a managed policy turns the sandbox off, the run is refused rather than executed unconfined.
Details
- The managed settings consulted are
sandbox.enabled,sandbox.failIfUnavailableandsandbox.allowUnsandboxedCommands; weakening any of them produces "eval shell grant refused: managed policy suppresses the sandbox". - A credential path containing glob characters also causes a refusal, since the denial could not be stated exactly.
Evidence
A shell tool (Bash or PowerShell) was granted but this machine cannot confine it (no sandbox backend on this platform, or it is not installed), so the run was refused rather than run unconfined
Strings lifted out of the shipped bundle, so the claim above can be checked against them.