dart_snapshot_header_parse

Parse the Dart isolate snapshot header in a libapp.so: magic, kind, 32-byte hash, features, target arch. Read-only.

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/dart-snapshot-header-parse.md

WHAT IT DOES

What dart_snapshot_header_parse does on Jshookmcp

AI agents call dart_snapshot_header_parse 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 dart_snapshot_header_parse is rated Low

Tool retrieves and parses static snapshot metadata without modifying data or triggering external operations.

From the tool's definition Parse...header...Read-only. No modifications or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

dart_snapshot_header_parse Allowed

dart_snapshot_header_parse 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": {
    "dart_snapshot_header_parse": {}
  }
}

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 dart_snapshot_header_parse call is checked against it from then on.

FAQ

Questions about dart_snapshot_header_parse

What does the dart_snapshot_header_parse tool do? +

Parse the Dart isolate snapshot header in a libapp.so: magic, kind, 32-byte hash, features, target arch. Read-only. 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 dart_snapshot_header_parse? +

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

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

Can I rate-limit dart_snapshot_header_parse? +

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

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

dart_snapshot_header_parse 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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