Low Risk

collect_wasm

Collect Wasm modules from network responses and runtime instantiation hooks.

How to control collect_wasm ↓

What collect_wasm does on JS Reverse Strong MCP

AI agents call collect_wasm to retrieve information from JS Reverse Strong MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

Why collect_wasm needs a policy

This tool observes and gathers WASM modules that are already present in network traffic or runtime memory. It performs inspection and logging of artifacts without creating side effects, modifying state, or executing arbitrary code. While it enables analysis of WASM for reverse engineering purposes, the tool itself is a read-only probe that retrieves information.

From the tool's definition Tool description: 'Collect Wasm modules from network responses and runtime instantiation hooks.' The verb 'collect' and 'from' indicate passive observation and data retrieval of WASM modules during runtime—no modification, deletion, or code execution.

Documented attack patterns abuse exactly the kind of access collect_wasm gives an agent:

How to control collect_wasm

PolicyLayer is an MCP gateway — it sits between your AI agents and JS Reverse Strong MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for collect_wasm:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "collect_wasm": {}
  }
}

collect_wasm is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

  1. Create a free account and register JS Reverse Strong MCP — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

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Questions about collect_wasm

What does the collect_wasm tool do? +

Collect Wasm modules from network responses and runtime instantiation hooks. It is categorised as a Read tool in the JS Reverse Strong MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on collect_wasm? +

Register the JS Reverse Strong MCP server in PolicyLayer and add a rule for collect_wasm: 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 JS Reverse Strong MCP. Nothing to install.

What risk level is collect_wasm? +

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

Can I rate-limit collect_wasm? +

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

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

collect_wasm is provided by the JS Reverse Strong MCP server (lwjjike/jsreverser-strong-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every JS Reverse Strong MCP tool call.

Start from JS Reverse Strong MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

Free to start. No card required.

85 JS Reverse Strong MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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