create_plan_graph · Dag Planner MCP: Risk & Policy

WHAT IT DOES

What create_plan_graph does on Dag Planner

AI agents use create_plan_graph 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 create_plan_graph needs a policy

This tool creates (writes) new structured data—a DAG and its constituent tasks—into the workflow run state. While creation is reversible in principle (tasks can be deleted or a new plan can overwrite the old), it materially alters the workflow's execution plan and can trigger downstream task execution.

From the tool's definition Tool description states it will 'Create a plan graph' — a generative action that modifies the workflow state by adding a directed acyclic graph (DAG) of tasks to an existing run.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_plan_graph Rate-limited

create_plan_graph 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": {
    "create_plan_graph": {
      "limits": [
        {
          "counter": "create_plan_graph_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 create_plan_graph

What does the create_plan_graph tool do? +

Create a plan graph (DAG of tasks) for an existing run. 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 create_plan_graph? +

Register the Dag Planner MCP server in PolicyLayer and add a rule for create_plan_graph: 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 create_plan_graph? +

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

Can I rate-limit create_plan_graph? +

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

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

create_plan_graph 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.