nemu_setup_java_field

SERVERJshookmcp SOURCE@jshookmcp/jshook

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-vmoranv-jshookmcp/nemu-setup-java-field.md

WHAT IT DOES

What nemu_setup_java_field does on Jshookmcp

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

RISK

Why nemu_setup_java_field is rated Medium

Creates/registers mock Java fields, modifying emulation state reversibly.

From the tool's definition Register a mock Java field the emulated native code reads back via JNI

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs nemu_setup_java_field safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Jshookmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For nemu_setup_java_field, this is the rule to start with:

nemu_setup_java_field Rate-limited

nemu_setup_java_field 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": {
    "nemu_setup_java_field": {
      "limits": [
        {
          "counter": "nemu_setup_java_field_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Jshookmcp, apply this rule, and every nemu_setup_java_field call is checked against it from then on.

FAQ

Questions about nemu_setup_java_field

What does the nemu_setup_java_field tool do? +

Register a mock Java field the emulated native code reads back via JNI (GetFieldID/GetStaticFieldID + Get<Type>Field). Declaratively specify the value with valueInt, valueString, or valueBytes (base64) — the. It is categorised as a Write tool in the Jshookmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on nemu_setup_java_field? +

Register the Jshook MCP server in PolicyLayer and add a rule for nemu_setup_java_field: 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 Jshookmcp. Nothing to install.

What risk level is nemu_setup_java_field? +

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

Can I rate-limit nemu_setup_java_field? +

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

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

nemu_setup_java_field is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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