set_probe_constant

EC circuits only: set the conductivity probe's cell constant K to match the probe

SERVERPypi:labmcp Alicat SOURCEpypi:labmcp-alicat

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/lab-instrument-mcps/set-probe-constant.md

WHAT IT DOES

What set_probe_constant does on Pypi:labmcp Alicat

AI agents use set_probe_constant to create or update resources in Pypi:labmcp Alicat, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pypi:labmcp Alicat environment.

RISK

Why set_probe_constant is rated Medium

Modifies probe calibration parameter reversibly; affects measurement accuracy but not destructively irreversible.

From the tool's definition set the conductivity probe's cell constant K to match the probe

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_probe_constant safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Pypi:labmcp Alicat, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_probe_constant, this is the rule to start with:

set_probe_constant Rate-limited

set_probe_constant 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": {
    "set_probe_constant": {
      "limits": [
        {
          "counter": "set_probe_constant_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Pypi:labmcp Alicat, apply this rule, and every set_probe_constant call is checked against it from then on.

FAQ

Questions about set_probe_constant

What does the set_probe_constant tool do? +

EC circuits only: set the conductivity probe's cell constant K to match the probe. It is categorised as a Write tool in the Pypi:labmcp Alicat MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_probe_constant? +

Register the Pypi:labmcp Alicat MCP server in PolicyLayer and add a rule for set_probe_constant: 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 Pypi:labmcp Alicat. Nothing to install.

What risk level is set_probe_constant? +

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

Can I rate-limit set_probe_constant? +

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

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

set_probe_constant is provided by the Pypi:labmcp Alicat MCP server (pypi:labmcp-alicat). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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