List farmware env vars. Camera calibration values (CAMERA_CALIBRATION_coord_scale, CAMERA_CALIBRATION_camera_z, CAMERA_CALIBRATION_image_bot_origin_location, etc.) and WEED_DETECTOR_* values are stored here.
AI agents call farmbot_list_farmware_envs to retrieve information from Farmbot Agent without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves stored environment variables and camera calibration data without modifying or deleting anything. While it is a Read operation (no side effects), the severity is medium rather than low because camera calibration values and detector configurations could potentially be used by an attacker to understand and circumvent the bot's vision-based safety systems or operational parameters, making…
From the tool's definition Tool description states it 'List farmware env vars' and retrieves 'Camera calibration values' and 'WEED_DETECTOR_* values' without modification or deletion. The verb 'list' and action of retrieving stored configuration data indicate read-only retrieval.
Attacks that exploit this kind of access
List farmware env vars. Camera calibration values (CAMERA_CALIBRATION_coord_scale, CAMERA_CALIBRATION_camera_z, CAMERA_CALIBRATION_image_bot_origin_location, etc.) and WEED_DETECTOR_* values are stored here. It is categorised as a Read tool in the Farmbot Agent MCP Server, which means it retrieves data without modifying state.
Register the Farmbot Agent MCP server in PolicyLayer and add a rule for farmbot_list_farmware_envs: 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.
farmbot_list_farmware_envs is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the farmbot_list_farmware_envs 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.
Set action: deny in the PolicyLayer policy for farmbot_list_farmware_envs. 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.
farmbot_list_farmware_envs 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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