batch_crawl · Crawl4AI MCP Server MCP: Risk & Policy

WHAT IT DOES

What batch_crawl does on Crawl4AI MCP Server

AI agents invoke batch_crawl to trigger actions in Crawl4AI MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why batch_crawl needs a policy

Based on the server context and sibling tools, batch_crawl likely executes web crawling operations against multiple URLs simultaneously. Crawling involves executing HTTP requests and potentially JavaScript, which constitutes external operations. The description is empty, lowering confidence. Severity is high due to potential for large-scale external requests, bandwidth abuse, or hitting unauthorized sites in batch.

From the tool's definition Tool name 'batch_crawl' on a server described as enabling 'advanced web crawling and content extraction with JavaScript support'. Sibling tools include crawl_url, deep_crawl_site, suggesting batch_crawl performs multiple crawl operations.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

batch_crawl Rate-limited

batch_crawl 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Crawl4AI MCP Server, so you can run agents against it safely.

FAQ

Questions about batch_crawl

What does the batch_crawl tool do? +

batch_crawl. It is categorised as a Execute tool in the Crawl4AI MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on batch_crawl? +

Register the Crawl4AI MCP Server MCP server in PolicyLayer and add a rule for batch_crawl: 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 Crawl4AI MCP Server. Nothing to install.

What risk level is batch_crawl? +

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

Can I rate-limit batch_crawl? +

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

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

batch_crawl is provided by the Crawl4AI MCP Server MCP server (sruckh/crawl-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.