farmbot_set_farmware_env · Farmbot Agent MCP: Risk & Policy

WHAT IT DOES

What farmbot_set_farmware_env does on Farmbot Agent

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

WHY IT NEEDS A POLICY

Why farmbot_set_farmware_env needs a policy

This tool modifies device configuration state reversibly without deleting data, placing it in the Write category. Severity is high because misconfiguring camera calibration or detector thresholds could cause the robotic gardening system to malfunction, damage plants, misidentify weeds, or behave unpredictably—representing significant operational risk, though not financial loss or permanent destruction.

From the tool's definition Tool description explicitly states 'Set or update a farmware env var by key (upsert)' and enables overriding critical device configurations like 'camera calibration values, weed detector thresholds, or any other on-device config.' The upsert operation creates…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

farmbot_set_farmware_env Rate-limited

farmbot_set_farmware_env 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": {
    "farmbot_set_farmware_env": {
      "limits": [
        {
          "counter": "farmbot_set_farmware_env_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 Farmbot Agent, so you can run agents against it safely.

FAQ

Questions about farmbot_set_farmware_env

What does the farmbot_set_farmware_env tool do? +

Set or update a farmware env var by key (upsert). Use this to override camera calibration values, weed detector thresholds, or any other on-device config. Always stored as a string. It is categorised as a Write tool in the Farmbot Agent MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on farmbot_set_farmware_env? +

Register the Farmbot Agent MCP server in PolicyLayer and add a rule for farmbot_set_farmware_env: 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 Farmbot Agent. Nothing to install.

What risk level is farmbot_set_farmware_env? +

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

Can I rate-limit farmbot_set_farmware_env? +

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

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

farmbot_set_farmware_env is provided by the Farmbot Agent MCP server (kieranklaassen/farmbot-agent-cli-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.