powershell_script

Run a local multi-line PowerShell script from a temporary UTF-8 .ps1 file.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-control-plane/powershell-script.md

WHAT IT DOES

What powershell_script does on Mcp Control Plane

AI agents invoke powershell_script to trigger actions in Mcp Control Plane. 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.

RISK

Why powershell_script is rated High

This tool executes arbitrary PowerShell scripts on the local system. The ability to run multi-line scripts means an AI agent could execute any command with the privileges of the running process, including file operations, system modifications, network calls, and potentially destructive actions.

From the tool's definition Tool description states 'Run a local multi-line PowerShell script', which directly executes arbitrary code. PowerShell is a command-line shell and scripting language capable of performing system-level operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs powershell_script safely

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

powershell_script Rate-limited

powershell_script 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": {
    "powershell_script": {
      "limits": [
        {
          "counter": "powershell_script_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every powershell_script call is checked against it from then on.

FAQ

Questions about powershell_script

What does the powershell_script tool do? +

Run a local multi-line PowerShell script from a temporary UTF-8 .ps1 file. It is categorised as a Execute tool in the Mcp Control Plane MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on powershell_script? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for powershell_script: 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 Mcp Control Plane. Nothing to install.

What risk level is powershell_script? +

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

Can I rate-limit powershell_script? +

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

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

powershell_script is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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