send_serial_command · Silotek Serial MCP: Risk & Policy

WHAT IT DOES

What send_serial_command does on Silotek Serial

AI agents invoke send_serial_command to trigger actions in Silotek Serial. 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_serial_command needs a policy

The tool name strongly suggests it sends commands over a serial interface to embedded hardware (ESP32, STM32). This is an Execute-category action because it triggers external operations on physical devices. Misuse could cause firmware crashes, hardware damage, or unintended device behavior. Confidence is reduced because the description is empty, so exact behavior is inferred from the name and server context alone.

From the tool's definition Tool name 'send_serial_command' — 'send' and 'command' imply active transmission of instructions to an external device

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_serial_command Rate-limited

send_serial_command 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_serial_command": {
      "limits": [
        {
          "counter": "send_serial_command_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 Silotek Serial, so you can run agents against it safely.

FAQ

Questions about send_serial_command

What does the send_serial_command tool do? +

send_serial_command. It is categorised as a Execute tool in the Silotek Serial 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_serial_command? +

Register the Silotek Serial MCP server in PolicyLayer and add a rule for send_serial_command: 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 Silotek Serial. Nothing to install.

What risk level is send_serial_command? +

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

Can I rate-limit send_serial_command? +

Yes. Add a rate_limit block to the send_serial_command 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_serial_command completely? +

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

send_serial_command is provided by the Silotek Serial MCP server (jocoin94/silotek-serial-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.