create_rule_set · Web Scraper MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_rule_set does on Web Scraper MCP Server

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

WHY IT NEEDS A POLICY

Why create_rule_set needs a policy

This tool creates and stores new rule sets in the scraper's configuration, which is a reversible data modification operation. It does not execute scraping itself (Execute), delete data (Destructive), or retrieve data without side effects (Read).

From the tool's definition Tool name is 'create_rule_set' and description indicates it creates 'custom content extraction rule sets' (创建一套自定义的内容提取规则集).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_rule_set Rate-limited

create_rule_set 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": {
    "create_rule_set": {
      "limits": [
        {
          "counter": "create_rule_set_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 Web Scraper MCP Server, so you can run agents against it safely.

FAQ

Questions about create_rule_set

What does the create_rule_set tool do? +

创建一套自定义的内容提取规则集，用于后续的精准爬取。. It is categorised as a Write tool in the Web Scraper MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_rule_set? +

Register the Web Scraper MCP Server MCP server in PolicyLayer and add a rule for create_rule_set: 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 Web Scraper MCP Server. Nothing to install.

What risk level is create_rule_set? +

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

Can I rate-limit create_rule_set? +

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

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

create_rule_set is provided by the Web Scraper MCP Server MCP server (naku111/mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.