terminal-customize · Mcp Terminal MCP: Risk & Policy

WHAT IT DOES

What terminal-customize does on Mcp Terminal

AI agents invoke terminal-customize to trigger actions in Mcp Terminal. 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 terminal-customize needs a policy

The description is vague ('customize a terminal tab'), but given the server context of interactive terminal execution and sibling tools like terminal-write (which can send commands to a terminal), customization of a terminal tab likely involves modifying session properties or behavior that could influence command execution.

From the tool's definition "Customize a terminal tab" — the tool acts on a terminal session within a server described as enabling running interactive terminals

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

terminal-customize Rate-limited

terminal-customize 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": {
    "terminal-customize": {
      "limits": [
        {
          "counter": "terminal-customize_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 Mcp Terminal, so you can run agents against it safely.

FAQ

Questions about terminal-customize

What does the terminal-customize tool do? +

Customize a terminal tab. It is categorised as a Execute tool in the Mcp Terminal MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on terminal-customize? +

Register the Mcp Terminal MCP server in PolicyLayer and add a rule for terminal-customize: 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 Terminal. Nothing to install.

What risk level is terminal-customize? +

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

Can I rate-limit terminal-customize? +

Yes. Add a rate_limit block to the terminal-customize 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 terminal-customize completely? +

Set action: deny in the PolicyLayer policy for terminal-customize. 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 terminal-customize? +

terminal-customize is provided by the Mcp Terminal MCP server (unfathomable-siren38/mcp-terminal-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.