identity_create_workload_identity

THE RISK

Medium Risk

Why identity_create_workload_identity needs a policy

This tool creates workload identity resources, which modifies AWS identity configuration state reversibly. While identity creation is a significant operation affecting access control, it is Write rather than Execute/Destructive because: (1) identity creation is a standard configuration operation, (2) it does not directly execute arbitrary code or commands, and (3) the changes can theoretically be reversed by…

From the tool's definition Tool name 'identity_create_workload_identity' indicates creation of a workload identity resource. The 'create' verb signals a Write operation that generates new identity configurations.

Documented attack patterns abuse exactly the kind of access identity_create_workload_identity gives an agent:

POLICY

How to control identity_create_workload_identity

PolicyLayer is an MCP gateway — it sits between your AI agents and Prometheus MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for identity_create_workload_identity:

policy.json

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

identity_create_workload_identity 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.

Create a free account and register Prometheus MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about identity_create_workload_identity

What does the identity_create_workload_identity tool do? +

identity_create_workload_identity. It is categorised as a Write tool in the Prometheus 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 identity_create_workload_identity? +

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

What risk level is identity_create_workload_identity? +

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

Can I rate-limit identity_create_workload_identity? +

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

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

identity_create_workload_identity is provided by the Prometheus MCP Server MCP server (awslabs.prometheus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Prometheus MCP Server tool call.

Start from Prometheus MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →