memory_patch_nop
NOP out instructions at address (replace with 0x90). Useful for disabling checks or jumps.
This record as markdown: /tools/io-github-vmoranv-jshookmcp/memory-patch-nop.md
What memory_patch_nop does on Jshookmcp
AI agents invoke memory_patch_nop to trigger actions in Jshookmcp. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why memory_patch_nop is rated High
Patches live memory to disable security checks, enabling arbitrary code flow manipulation.
From the tool's definition NOP out instructions, replace with 0x90, disabling checks
Attacks that exploit this kind of access
The rule that runs memory_patch_nop 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 memory_patch_nop, this is the rule to start with:
memory_patch_nop stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. 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 memory_patch_nop call is checked against it from then on.
Questions about memory_patch_nop
NOP out instructions at address (replace with 0x90). Useful for disabling checks or jumps. It is categorised as a Execute tool in the Jshookmcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Jshook MCP server in PolicyLayer and add a rule for memory_patch_nop: 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.
memory_patch_nop is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the memory_patch_nop 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 memory_patch_nop. 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.
memory_patch_nop 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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