graph_create_decision · IMS MCP Server MCP: Risk & Policy

WHAT IT DOES

What graph_create_decision does on IMS MCP Server

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

WHY IT NEEDS A POLICY

Why graph_create_decision needs a policy

The tool creates a new entity (decision) in what appears to be a knowledge graph, modifying stored state. This is a Write operation rather than Read (it does not just retrieve), Execute (it does not run arbitrary code), or Destructive (decisions can typically be updated or removed without being permanently lost).

From the tool's definition Tool name 'graph_create_decision' contains 'create', which is a write operation. The IMS server description indicates it manages 'memory storage' and 'context' across sessions. Creating a decision in a graph structure would add new data to the system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

graph_create_decision Rate-limited

graph_create_decision 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": {
    "graph_create_decision": {
      "limits": [
        {
          "counter": "graph_create_decision_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 IMS MCP Server, so you can run agents against it safely.

FAQ

Questions about graph_create_decision

What does the graph_create_decision tool do? +

graph_create_decision. It is categorised as a Write tool in the IMS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on graph_create_decision? +

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

What risk level is graph_create_decision? +

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

Can I rate-limit graph_create_decision? +

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

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

graph_create_decision is provided by the IMS MCP Server MCP server (jdelon02/ims-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.