nemu_vm_state_compare
Compare native VM state (read from guest memory) against an expected state (e.g. Python LiteVM dump). For each of ctx, table, and output, reports whether they match and lists the first mismatches. Use to cross-validate native VM execution against the known-good Python implementation.
This record as markdown: /tools/io-github-vmoranv-jshookmcp/nemu-vm-state-compare.md
What nemu_vm_state_compare does on Jshookmcp
AI agents call nemu_vm_state_compare to retrieve information from Jshookmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why nemu_vm_state_compare is rated Low
Tool reads and compares VM state without modifying or executing operations.
From the tool's definition Compare native VM state, read from guest memory, cross-validate execution
Attacks that exploit this kind of access
The rule that runs nemu_vm_state_compare 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_vm_state_compare, this is the rule to start with:
nemu_vm_state_compare is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Jshookmcp, apply this rule, and every nemu_vm_state_compare call is checked against it from then on.
Questions about nemu_vm_state_compare
Compare native VM state (read from guest memory) against an expected state (e.g. Python LiteVM dump). For each of ctx, table, and output, reports whether they match and lists the first mismatches. Use to cross-validate native VM execution against the known-good Python implementation. It is categorised as a Read tool in the Jshookmcp MCP Server, which means it retrieves data without modifying state.
Register the Jshook MCP server in PolicyLayer and add a rule for nemu_vm_state_compare: 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.
nemu_vm_state_compare 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 nemu_vm_state_compare 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 nemu_vm_state_compare. 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.
nemu_vm_state_compare 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.
More on Jshook, and thousands of servers like it.
This server
Across the catalogue