replace_plan_branch · Dag Planner MCP: Risk & Policy

WHAT IT DOES

What replace_plan_branch does on Dag Planner

AI agents use replace_plan_branch to create or update resources in Dag Planner — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Dag Planner environment.

WHY IT NEEDS A POLICY

Why replace_plan_branch needs a policy

An AI agent can call replace_plan_branch faster than any human can review — one bad instruction and it creates or modifies resources in Dag Planner by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

replace_plan_branch Rate-limited

replace_plan_branch stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "replace_plan_branch": {
      "limits": [
        {
          "counter": "replace_plan_branch_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about replace_plan_branch

What does the replace_plan_branch tool do? +

Cancel downstream tasks from anchor and replace with new tasks. It is categorised as a Write tool in the Dag Planner MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on replace_plan_branch? +

Register the Dag Planner MCP server in PolicyLayer and add a rule for replace_plan_branch: 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 Dag Planner. Nothing to install.

What risk level is replace_plan_branch? +

replace_plan_branch is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit replace_plan_branch? +

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

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

replace_plan_branch is provided by the Dag Planner MCP server (shubhamnegi/dag-planner-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.