adopt_worker

THE RISK

Low Risk

Why adopt_worker needs a policy

The description is empty, so classification is uncertain. In the context of a server that manages Claude Code worker sessions in iTerm2, 'adopt_worker' likely means associating an existing terminal session as a managed worker (a Write-level registration operation). However, it could involve executing or controlling a session.

From the tool's definition Tool name is 'adopt_worker' but description is empty/uninformative. Based on sibling tools context (spawn, monitor, message worker sessions), 'adopt' likely means taking control of an existing worker session.

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

POLICY

How to control adopt_worker

PolicyLayer is an MCP gateway — it sits between your AI agents and Claude Team MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for adopt_worker:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "adopt_worker": {
      "limits": [
        {
          "counter": "adopt_worker_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

adopt_worker gets a rate cap, and everything else on the server is denied unless you say otherwise.

Create a free account and register Claude Team MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

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All 16 Claude Team MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about adopt_worker

What does the adopt_worker tool do? +

adopt_worker. It is categorised as a Other tool in the Claude Team MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on adopt_worker? +

Register the Claude Team MCP Server MCP server in PolicyLayer and add a rule for adopt_worker: 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 Team MCP Server. Nothing to install.

What risk level is adopt_worker? +

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

Can I rate-limit adopt_worker? +

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

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

adopt_worker is provided by the Claude Team MCP Server MCP server (martian-engineering/maniple). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Team MCP Server tool call.

Start from Claude Team MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →