config-unset

Server Jj jj-mcp-server

Category Execute

Risk class High

Parameters 00 required

WHAT IT DOES

What config-unset does on Jj

AI agents invoke config-unset to trigger actions in Jj. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why config-unset needs a policy

config-unset triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

config-unset Rate-limited

config-unset stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "config-unset": {
      "limits": [
        {
          "counter": "config-unset_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Jj, so you can run agents against it safely.

FAQ

Questions about config-unset

What does the config-unset tool do? +

Unset a config option in a Jujutsu (jj) repository. Removes from either user or repo config file. Parameters: name (Name of config option to unset), user (Optional flag to unset user-level config), repo (Optional flag to unset repo-level config), repoPath (Optional path to repo root or working directory), cwd (Optional working directory to run the command in). It is categorised as a Execute tool in the Jj MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on config-unset? +

Register the Jj MCP server in PolicyLayer and add a rule for config-unset: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Jj. Nothing to install.

What risk level is config-unset? +

config-unset is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit config-unset? +

Yes. Add a rate_limit block to the config-unset rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block config-unset completely? +

Set action: deny in the PolicyLayer policy for config-unset. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides config-unset? +

config-unset is provided by the Jj MCP server (jj-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.