create_role · Morpheus MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_role does on Morpheus MCP Server

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

WHY IT NEEDS A POLICY

Why create_role needs a policy

This tool creates new roles in a multi-tenant cloud infrastructure management system (HPE Morpheus). While reversible via deletion, creating roles can grant broad permissions across the infrastructure, affecting security posture and access control for multiple tenants. The impact is significant (high severity) but the action itself is reversible, making it Write rather than Destructive.

From the tool's definition Tool description states 'Create a new role in Morpheus', which is a create operation that modifies the role-based access control (RBAC) configuration of a cloud infrastructure management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_role Rate-limited

create_role 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_role": {
      "limits": [
        {
          "counter": "create_role_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 Morpheus MCP Server, so you can run agents against it safely.

FAQ

Questions about create_role

What does the create_role tool do? +

Create a new role in Morpheus. It is categorised as a Write tool in the Morpheus 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 create_role? +

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

What risk level is create_role? +

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

Can I rate-limit create_role? +

Yes. Add a rate_limit block to the create_role 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_role completely? +

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

create_role is provided by the Morpheus MCP Server MCP server (nixndme/morpheus-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.