set_mix · Betaflight MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_mix does on Betaflight MCP Server

AI agents use set_mix to create or update resources in Betaflight MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Betaflight MCP Server environment.

WHY IT NEEDS A POLICY

Why set_mix needs a policy

This tool modifies flight controller configurations by setting up or changing how inputs are mixed and routed to control channels. This is a reversible configuration change (not destructive - can be reconfigured or reverted via backup_configuration). It affects drone behavior directly but the effect depends entirely on the mix parameters provided by the user.

From the tool's definition set_mix: 'Configurar o modificar un mix en un canal' - creates or modifies channel mix configurations in a drone flight controller, mapping input sources (switches, sticks, inputs, potentiometers) to control channels.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_mix Rate-limited

set_mix 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_mix": {
      "limits": [
        {
          "counter": "set_mix_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Betaflight MCP Server, so you can run agents against it safely.

FAQ

Questions about set_mix

What does the set_mix tool do? +

Configurar o modificar un mix en un canal. Fuentes válidas: SA-SF (switches), Ail/Ele/Thr/Rud (sticks), I1-I32 (inputs), S1/S2 (pots), MAX. It is categorised as a Write tool in the Betaflight MCP Server 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_mix? +

Register the Betaflight MCP Server MCP server in PolicyLayer and add a rule for set_mix: 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 Betaflight MCP Server. Nothing to install.

What risk level is set_mix? +

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

Can I rate-limit set_mix? +

Yes. Add a rate_limit block to the set_mix 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_mix completely? +

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

set_mix is provided by the Betaflight MCP Server MCP server (jir13/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.