dart_pc_descriptors

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-pc-descriptors.md

WHAT IT DOES

What dart_pc_descriptors does on Jshookmcp

AI agents call dart_pc_descriptors 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_pc_descriptors is rated Low

Analyzes loaded Dart snapshots to extract call information; no modification or execution occurs.

From the tool's definition Parse PcDescriptors, decoding ARM64 BL instructions, resolve call targets, returns structured entries

Attacks that exploit this kind of access

RECOMMENDED RULE

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

dart_pc_descriptors Allowed

dart_pc_descriptors 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_pc_descriptors": {}
  }
}

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_pc_descriptors call is checked against it from then on.

FAQ

Questions about dart_pc_descriptors

What does the dart_pc_descriptors tool do? +

Parse PcDescriptors for one or all Dart functions in a loaded snapshot and resolve call targets by decoding ARM64 BL instructions at each call-site PC offset. Returns structured call-site entries with pcOffset, kind (1=icCall, 2=unoptStaticCall, 3=runtimeCall), and optionally resolved target addresses when code section bytes are available. Pass a sessionId or file path to load the snapshot. 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_pc_descriptors? +

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

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

Can I rate-limit dart_pc_descriptors? +

Yes. Add a rate_limit block to the dart_pc_descriptors 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_pc_descriptors completely? +

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

dart_pc_descriptors 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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