List sensor readings recorded by the FarmBot. Includes soil moisture probe values, tool verification reads, and any pin reads taken during sequences. Returns readings with timestamps, pin numbers, modes, and values.
AI agents call farmbot_list_sensor_readings 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 historical sensor data from the FarmBot device. It performs no modifications, deletions, or external operations—it only reads and returns existing sensor readings. This is a straightforward data retrieval operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool description explicitly states 'List sensor readings' and 'Returns readings with timestamps, pin numbers, modes, and values.' The verb 'list' and 'returns' indicate pure data retrieval with no modification or side effects.
Attacks that exploit this kind of access
List sensor readings recorded by the FarmBot. Includes soil moisture probe values, tool verification reads, and any pin reads taken during sequences. Returns readings with timestamps, pin numbers, modes, and values. 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_sensor_readings: 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_sensor_readings 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_sensor_readings 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_sensor_readings. 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_sensor_readings 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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