measure_energy
AI agents call measure_energy to retrieve information from Joulescope without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The measure_energy tool retrieves energy measurements from the JouleScope JS220 device. This is a read operation that queries sensor data without modifying device state, creating data, executing arbitrary commands, or causing destructive changes. The confidence is high despite the empty description because the tool name and server context clearly indicate measurement/sensing functionality.
From the tool's definition Tool name 'measure_energy' combined with server description stating it 'enables agents to measure current, voltage, power, charge, and energy' indicates data retrieval from a precision energy analyzer device.
Attacks that exploit this kind of access
measure_energy. It is categorised as a Read tool in the Joulescope MCP Server, which means it retrieves data without modifying state.
Register the Joulescope MCP server in PolicyLayer and add a rule for measure_energy: 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 Joulescope. Nothing to install.
measure_energy 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 measure_energy 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 measure_energy. 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.
measure_energy is provided by the Joulescope MCP server (juanqui/joulescope-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.
Teams ship this data inside their own products. See what a licence covers →