pump_chamber · mcpXL30 MCP: Risk & Policy

WHAT IT DOES

What pump_chamber does on mcpXL30

AI agents invoke pump_chamber to trigger actions in mcpXL30. 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 pump_chamber needs a policy

This tool executes a real-world operation (chamber pump cycle) on expensive scientific equipment. While not immediately destructive or financial, misuse could cause equipment damage (over-pumping, vacuum seal failure, sample contamination) or safety hazards (improper vacuum states). The safety envelope mentioned in the server description suggests sensitive operations require protection.

From the tool's definition Tool name 'pump_chamber' combined with context that it 'triggers the XL30 pump cycle' indicates execution of a mechanical/physical operation on scientific equipment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pump_chamber Rate-limited

pump_chamber 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": {
    "pump_chamber": {
      "limits": [
        {
          "counter": "pump_chamber_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 mcpXL30, so you can run agents against it safely.

FAQ

Questions about pump_chamber

What does the pump_chamber tool do? +

Trigger the XL30 pump cycle. It is categorised as a Execute tool in the mcpXL30 MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on pump_chamber? +

Register the mcpXL30 MCP server in PolicyLayer and add a rule for pump_chamber: 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 mcpXL30. Nothing to install.

What risk level is pump_chamber? +

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

Can I rate-limit pump_chamber? +

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

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

pump_chamber is provided by the mcpXL30 MCP server (tspspi/mcpxl30). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.