get_promql_labels

THE RISK

Low Risk

Why get_promql_labels needs a policy

PromQL label retrieval is a non-destructive query operation that retrieves metadata about available labels in a Prometheus monitoring system. This is a Read action with no side effects. Despite the empty description, the tool name strongly indicates data retrieval rather than modification or execution.

From the tool's definition Tool named 'get_promql_labels' which queries labels from Prometheus Query Language (PromQL) — a read operation. Description is empty, reducing confidence slightly.

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

POLICY

How to control get_promql_labels

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

policy.json

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

get_promql_labels 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 Amazon ECS 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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All 805 Amazon ECS MCP Server tools →

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Go deeper

Roll out MCP under one policy → Per-person scoped tokens, one central policy, and full audit across every server your team connects.
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 →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about get_promql_labels

What does the get_promql_labels tool do? +

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

How do I enforce a policy on get_promql_labels? +

Register the Amazon ECS MCP Server MCP server in PolicyLayer and add a rule for get_promql_labels: 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 Amazon ECS MCP Server. Nothing to install.

What risk level is get_promql_labels? +

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

Can I rate-limit get_promql_labels? +

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

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

get_promql_labels is provided by the Amazon ECS MCP Server MCP server (awslabs.ecs-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 Amazon ECS MCP Server tool call.

Start from Amazon ECS 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 →