QBusinessQueryTool

THE RISK

Low Risk

Why QBusinessQueryTool needs a policy

The tool name suggests querying Amazon Q Business, which is typically a Read operation (querying a knowledge base or AI assistant). However, without a description, there is uncertainty about whether it executes queries with side effects or retrieves data.

From the tool's definition Tool name: QBusinessQueryTool — description is empty and uninformative.

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

POLICY

How to control QBusinessQueryTool

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 QBusinessQueryTool:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "QBusinessQueryTool": {
      "limits": [
        {
          "counter": "qbusinessquerytool_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

QBusinessQueryTool gets a rate cap, and 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.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about QBusinessQueryTool

What does the QBusinessQueryTool tool do? +

QBusinessQueryTool. It is categorised as a Other tool in the Prometheus MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on QBusinessQueryTool? +

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

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

Can I rate-limit QBusinessQueryTool? +

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

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

QBusinessQueryTool 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 →