robot_scan_barcode · Execution Market MCP: Risk & Policy

WHAT IT DOES

What robot_scan_barcode does on Execution Market

AI agents use robot_scan_barcode to create or update resources in Execution Market — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Execution Market environment.

WHY IT NEEDS A POLICY

Why robot_scan_barcode needs a policy

This tool writes evidence/submission data to an Execution Market task. It creates or modifies a task record by attaching barcode/QR evidence, which is a reversible write operation. While it operates within a financial platform (USDC payments), the tool itself does not move money — it only submits evidence that may later trigger payment approval by a separate tool (em_approve_submission).

From the tool's definition Submit a decoded barcode/QR payload as evidence for an Execution Market task

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

robot_scan_barcode Rate-limited

robot_scan_barcode 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about robot_scan_barcode

What does the robot_scan_barcode tool do? +

Submit a decoded barcode/QR payload as evidence for an Execution Market task. It is categorised as a Write tool in the Execution Market MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on robot_scan_barcode? +

Register the Execution Market MCP server in PolicyLayer and add a rule for robot_scan_barcode: 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 Execution Market. Nothing to install.

What risk level is robot_scan_barcode? +

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

Can I rate-limit robot_scan_barcode? +

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

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

robot_scan_barcode is provided by the Execution Market MCP server (https://mcp.execution.market/mcp/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.