identity_list_workload_identities

THE RISK

Low Risk

Why identity_list_workload_identities needs a policy

The naming convention strongly suggests a listing/querying operation that retrieves existing workload identities without modification. 'List' operations are classified as Read. Despite the empty description reducing confidence slightly, the verb 'list' is a reliable indicator of a non-destructive retrieval action. No evidence of side effects, data modification, or deletion capabilities.

From the tool's definition Tool name 'identity_list_workload_identities' contains 'list', which is a retrieval operation. Description is empty, limiting direct confirmation.

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

POLICY

How to control identity_list_workload_identities

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_list_workload_identities:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "identity_list_workload_identities": {}
  }
}

identity_list_workload_identities is read-only, so it stays allowed — but 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.

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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.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about identity_list_workload_identities

What does the identity_list_workload_identities tool do? +

identity_list_workload_identities. It is categorised as a Read tool in the Prometheus MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on identity_list_workload_identities? +

Register the Prometheus MCP Server MCP server in PolicyLayer and add a rule for identity_list_workload_identities: 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_list_workload_identities? +

identity_list_workload_identities is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit identity_list_workload_identities? +

Yes. Add a rate_limit block to the identity_list_workload_identities 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_list_workload_identities completely? +

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

identity_list_workload_identities 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 →