set_vtx_channel · Betaflight MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_vtx_channel does on Betaflight MCP Server

AI agents use set_vtx_channel 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_vtx_channel needs a policy

VTX channel selection is a write operation that modifies drone transmission settings but does not delete data, execute arbitrary code, incur financial costs, or cause irreversible harm. The change is easily reversible by selecting a different channel. While it could cause operational issues (interference, loss of video feed), the action itself is a simple configuration write with predictable, bounded scope.

From the tool's definition Tool changes VTX channel (1-8), modifying transmitter settings that are reversible and represent a non-destructive configuration change. The description indicates a state update with discrete, limited options.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_vtx_channel Rate-limited

set_vtx_channel 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_vtx_channel": {
      "limits": [
        {
          "counter": "set_vtx_channel_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_vtx_channel

What does the set_vtx_channel tool do? +

Change VTX channel (1-8). 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_vtx_channel? +

Register the Betaflight MCP Server MCP server in PolicyLayer and add a rule for set_vtx_channel: 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_vtx_channel? +

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

Can I rate-limit set_vtx_channel? +

Yes. Add a rate_limit block to the set_vtx_channel 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_vtx_channel completely? +

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

set_vtx_channel 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.