send_text · Ai Mcp Terminal MCP: Risk & Policy

WHAT IT DOES

What send_text does on Ai Mcp Terminal

AI agents invoke send_text to trigger actions in Ai 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 send_text needs a policy

Sending text to a terminal can trigger command execution depending on what is already running or waiting for input. In the context of a multi-threaded terminal management server that supports async command execution, injecting arbitrary text into a terminal is effectively an Execute-level action.

From the tool's definition 'send text to terminal' and 'Quick send text to terminal (convenience method of send_keys)' — sends arbitrary text/input directly to a terminal session

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_text Rate-limited

send_text 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": {
    "send_text": {
      "limits": [
        {
          "counter": "send_text_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 Ai Mcp Terminal, so you can run agents against it safely.

FAQ

Questions about send_text

What does the send_text tool do? +

v1.0.2: Quick send text to terminal (convenience method of send_keys). Sends string directly, not parsed as key. Suitable for quick text input. It is categorised as a Execute tool in the Ai 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 send_text? +

Register the Ai Mcp Terminal MCP server in PolicyLayer and add a rule for send_text: 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 Ai Mcp Terminal. Nothing to install.

What risk level is send_text? +

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

Can I rate-limit send_text? +

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

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

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