// SCAN REPORT

Joulescope

13 tools. 4 can modify or destroy data without limits.

4 write tools that can modify data. Rate limits recommended.

Last updated: 3 Jul 2026

4 can modify or destroy data

9 read-only

13 tools total

Community server · catalogue entry verified 03/07/2026

How to control Joulescope ↓

TOOL MAP

What Joulescope exposes to your agents

Read (9) Write / Execute (4) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous Joulescope tools

Write · Medium configure_frontend The tool modifies device configuration settings (current and voltage range modes) rather than merely reading data. Write · Medium publish_topic Publishing to a topic on an instrument control server like JouleScope typically creates or modifies configuration or state data. Write · Medium set_target_power Based on the tool name and server context (JouleScope JS220 energy analyzer), 'set_target_power' likely configures or toggles power delivery to a device under test. Write · Medium record_jls This tool writes raw measurement samples to a file on disk.

4 of Joulescope's 13 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Joulescope

PolicyLayer is an MCP gateway — it sits between your AI agents and Joulescope, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "configure_frontend": {
    "limits": [
      {
        "counter": "configure_frontend_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "capture_statistics": {
    "limits": [
      {
        "counter": "capture_statistics_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Joulescope — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON JOULESCOPE →

Instant setup, no code required.

FULL CATALOGUE

All 13 Joulescope tools

WRITE 4 tools

Write configure_frontend Configure JS220 current and voltage range modes. Use auto for normal agent measurements. Write publish_topic publish_topic Write record_jls Record raw JS220 samples to a JLS v2 file for later waveform analysis. Write set_target_power set_target_power

READ 9 tools

Read capture_statistics Capture JS220 statistics at frequency_hz for duration_s. This is a frequency-based wrapper around measure_ener Read cycle_target_power cycle_target_power Read device_info Return retained device topics and optional metadata for one JouleScope. Read list_devices List connected JouleScope devices, including JS220 serial and firmware details when available. Read list_topics List retained JouleScope driver topics with current values and optional metadata. Read measure_energy measure_energy Read query_topic Query a JouleScope driver topic. Provide a relative topic such as c/fw/version or an absolute device topic. Read read_gpi Read JS220 general-purpose input pin state as a 32-bit value and decoded pins. Read target_power_status target_power_status

FAQ

Questions about Joulescope

How do I prevent bulk modifications through Joulescope? +

The Joulescope server has 4 write tools including configure_frontend, publish_topic, record_jls. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Joulescope.

How many tools does the Joulescope MCP server expose? +

13 tools across 2 categories: Read, Write. 9 are read-only. 4 can modify, create, or delete data.

How do I enforce a policy on Joulescope? +

Register the Joulescope MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Joulescope tool call.

Deterministic rules across all 13 Joulescope tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON JOULESCOPE →

Instant setup, no code required.

13 Joulescope tools catalogued and risk-classified — across an index of 43,000+ MCP servers.