maker_start_sessions_bulk

THE RISK

High Risk

Why maker_start_sessions_bulk needs a policy

This tool creates/mints multiple session tokens (redemption codes) in bulk for learners. While it involves creation (Write), the act of minting authentication/session tokens is more akin to executing an administrative operation that grants access credentials at scale.

From the tool's definition 'Mint sessions for multiple learners sharing a batch_id. Returns an array of redemption codes for a printable QR sheet. Admin-only.'

Risk signalsAdmin/system-level operation

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

POLICY

How to control maker_start_sessions_bulk

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_start_sessions_bulk:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "maker_start_sessions_bulk": {
      "limits": [
        {
          "counter": "maker_start_sessions_bulk_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

maker_start_sessions_bulk stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

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All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about maker_start_sessions_bulk

What does the maker_start_sessions_bulk tool do? +

Mint sessions for multiple learners sharing a batch_id. Returns an array of redemption codes for a printable QR sheet. Admin-only. It is categorised as a Execute tool in the Crow MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on maker_start_sessions_bulk? +

Register the Crow MCP server in PolicyLayer and add a rule for maker_start_sessions_bulk: 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_start_sessions_bulk? +

maker_start_sessions_bulk is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit maker_start_sessions_bulk? +

Yes. Add a rate_limit block to the maker_start_sessions_bulk 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_start_sessions_bulk completely? +

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

maker_start_sessions_bulk 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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