nemu_regs_save

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-regs-save.md

WHAT IT DOES

What nemu_regs_save does on Jshookmcp

AI agents use nemu_regs_save 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_regs_save is rated Medium

Saves register state snapshot reversibly; no system-level destructive or financial impact.

From the tool's definition Save a named snapshot of current GPR registers

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs nemu_regs_save 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_regs_save, this is the rule to start with:

nemu_regs_save Rate-limited

nemu_regs_save 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_regs_save": {
      "limits": [
        {
          "counter": "nemu_regs_save_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_regs_save call is checked against it from then on.

FAQ

Questions about nemu_regs_save

What does the nemu_regs_save tool do? +

Save a named snapshot of current GPR registers (x0-x30, sp). Returns a snapshot id usable with nemu_regs_restore. The snapshot persists until the session is destroyed or the name is overwritten. Use to preserve registers before calling an obfuscated function that corrupts callee-saved state. 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_regs_save? +

Register the Jshook MCP server in PolicyLayer and add a rule for nemu_regs_save: 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_regs_save? +

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

Can I rate-limit nemu_regs_save? +

Yes. Add a rate_limit block to the nemu_regs_save 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_regs_save completely? +

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

nemu_regs_save 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.

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