wasm_agent_export · Claude Flow MCP: Risk & Policy

WHAT IT DOES

What wasm_agent_export does on Claude Flow

AI agents use wasm_agent_export to create or update resources in Claude Flow — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Claude Flow environment.

WHY IT NEEDS A POLICY

Why wasm_agent_export needs a policy

This tool creates/serializes and extracts a WASM agent, which is a reversible data creation/modification action. It does not delete data (not Destructive), does not directly move money (not Financial), and does not execute arbitrary code or shell commands at runtime (not Execute in the sense of triggering external side effects).

From the tool's definition Tool name is 'wasm_agent_export' and description states 'Export a WASM agent'. Export operations create or extract artifacts (in this case, serialized WASM agent code/state) that are then stored or transmitted.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wasm_agent_export Rate-limited

wasm_agent_export stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "wasm_agent_export": {
      "limits": [
        {
          "counter": "wasm_agent_export_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Claude Flow, so you can run agents against it safely.

FAQ

Questions about wasm_agent_export

What does the wasm_agent_export tool do? +

Export a WASM agent\. It is categorised as a Write tool in the Claude Flow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wasm_agent_export? +

Register the Claude Flow MCP server in PolicyLayer and add a rule for wasm_agent_export: 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 Claude Flow. Nothing to install.

What risk level is wasm_agent_export? +

wasm_agent_export is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit wasm_agent_export? +

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

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

wasm_agent_export is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.