`allowedTools` doesn't seem to show in `claude config ls`

I'm attempting to follow the instructions in the docs for allow-listing a tool

claude --version
0.2.30 (Claude Code)

claude config add allowedTools "Bash(npm test)"

...but then the config isn't there:

claude config ls
{
 "dontCrawlDirectory": false,
 "enableArchitectTool": "true",
 "hasTrustDialogAccepted": true,
 "hasCompletedProjectOnboarding": true,
 "ignorePatterns": []
}

claude config get allowedTools
Error: 'allowedTools' is not a valid config key. Valid keys are: dontCrawlDirectory, enableArchitectTool, hasTrustDialogAccepted, hasCompletedProjectOnboarding, ignorePatterns

Am I making some very basic mistake?