proto_define_pattern

Define a protocol pattern with delimiter, byte order, and field layout.

SERVERJshookmcp SOURCE@jshookmcp/jshook

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-vmoranv-jshookmcp/proto-define-pattern.md

WHAT IT DOES

What proto_define_pattern does on Jshookmcp

AI agents call proto_define_pattern 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.

RISK

Why proto_define_pattern is rated Low

Even though proto_define_pattern only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

proto_define_pattern Allowed

proto_define_pattern is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "proto_define_pattern": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about proto_define_pattern

What does the proto_define_pattern tool do? +

Define a protocol pattern with delimiter, byte order, and field layout. It is categorised as a Read tool in the Jshookmcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on proto_define_pattern? +

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

proto_define_pattern is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit proto_define_pattern? +

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

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

proto_define_pattern 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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