run_estimator_tool · Qiskit Gym MCP Server MCP

WHAT IT DOES

What run_estimator_tool does on Qiskit Gym MCP Server

AI agents invoke run_estimator_tool to trigger actions in Qiskit Gym MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why run_estimator_tool needs a policy

This tool executes quantum circuit estimation, which runs external quantum operations whose effects depend on input parameters (circuit structure, measurement settings, etc.). It does not appear to read-only query data, modify persistent state, delete anything, or move money. Classified as Execute rather than Read because it triggers computation rather than merely retrieving pre-computed results.

From the tool's definition Tool name 'run_estimator_tool' in a Qiskit Gym quantum circuit synthesis context indicates execution of quantum circuit estimation/simulation operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

run_estimator_tool Rate-limited

run_estimator_tool stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "run_estimator_tool": {
      "limits": [
        {
          "counter": "run_estimator_tool_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Qiskit Gym MCP Server, so you can run agents against it safely.

FAQ

Questions about run_estimator_tool

What does the run_estimator_tool tool do? +

run_estimator_tool. It is categorised as a Execute tool in the Qiskit Gym MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run_estimator_tool? +

Register the Qiskit Gym MCP Server MCP server in PolicyLayer and add a rule for run_estimator_tool: 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 Qiskit Gym MCP Server. Nothing to install.

What risk level is run_estimator_tool? +

run_estimator_tool is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit run_estimator_tool? +

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

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

run_estimator_tool is provided by the Qiskit Gym MCP Server MCP server (qiskit-gym-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.