approve_plan · Jules MCP Server MCP: Risk & Policy

WHAT IT DOES

What approve_plan does on Jules MCP Server

AI agents invoke approve_plan to trigger actions in Jules MCP Server. 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 approve_plan needs a policy

Approving a plan triggers Jules AI to execute a coding plan, initiating automated code changes, repository modifications, or other operations defined in the plan. This is an action that triggers external operations with effects depending on what the plan contains, making it Execute category.

From the tool's definition Approve Jules's plan for a session

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

approve_plan Rate-limited

approve_plan 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": {
    "approve_plan": {
      "limits": [
        {
          "counter": "approve_plan_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 Jules MCP Server, so you can run agents against it safely.

FAQ

Questions about approve_plan

What does the approve_plan tool do? +

Approve Jules's plan for a session. It is categorised as a Execute tool in the Jules MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on approve_plan? +

Register the Jules MCP Server MCP server in PolicyLayer and add a rule for approve_plan: 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 Jules MCP Server. Nothing to install.

What risk level is approve_plan? +

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

Can I rate-limit approve_plan? +

Yes. Add a rate_limit block to the approve_plan 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 approve_plan completely? +

Set action: deny in the PolicyLayer policy for approve_plan. 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 approve_plan? +

approve_plan is provided by the Jules MCP Server MCP server (paladiamors/jules-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.