maker_set_mode

Switch deployment mode between solo, family, classroom. Admin-only. Downgrading family→solo refuses if more than one learner profile exists (use the Archive & Downgrade flow in the panel instead).

ServerCrow
CategoryWrite

How to control maker_set_mode ↓

WHAT IT DOES

What maker_set_mode does on Crow

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

THE RISK

Medium Risk

Why maker_set_mode needs a policy

This tool modifies system configuration state (deployment mode) reversibly—modes can be switched back—and includes safeguards against unsafe transitions. It is not destructive because the change can be undone by switching modes again, and it does not execute arbitrary code or delete data.

From the tool's definition Tool description states it 'Switch[es] deployment mode' between different modes (solo, family, classroom) with admin-only access and validation logic that prevents unsafe downgrades.

Risk signalsAdmin/system-level operation

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

POLICY

How to control maker_set_mode

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

policy.json

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

maker_set_mode 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.

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

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about maker_set_mode

What does the maker_set_mode tool do? +

Switch deployment mode between solo, family, classroom. Admin-only. Downgrading family→solo refuses if more than one learner profile exists (use the Archive & Downgrade flow in the panel instead). It is categorised as a Write tool in the Crow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on maker_set_mode? +

Register the Crow MCP server in PolicyLayer and add a rule for maker_set_mode: 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 Crow. Nothing to install.

What risk level is maker_set_mode? +

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

Can I rate-limit maker_set_mode? +

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

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

maker_set_mode is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

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

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