set_domain_headers · Web Scraper MCP Server MCP

WHAT IT DOES

What set_domain_headers does on Web Scraper MCP Server

AI agents use set_domain_headers 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 set_domain_headers needs a policy

This tool writes/stores persistent configuration (global custom HTTP headers including cookies and authorization tokens) for a domain. It does not merely read data, but modifies the scraper's stored state. The severity is high because misuse could inject malicious credentials, exfiltrate authentication tokens, or enable session hijacking by setting headers that get sent with all subsequent requests to a domain.

From the tool's definition 为特定域名设置全局的自定义请求头（例如Cookie, Authorization），用于模拟登录状态或传递API密钥

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_domain_headers Rate-limited

set_domain_headers 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": {
    "set_domain_headers": {
      "limits": [
        {
          "counter": "set_domain_headers_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 set_domain_headers

What does the set_domain_headers tool do? +

为特定域名设置全局的自定义请求头（例如Cookie, Authorization），用于模拟登录状态或传递API密钥。. 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 set_domain_headers? +

Register the Web Scraper MCP Server MCP server in PolicyLayer and add a rule for set_domain_headers: 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 set_domain_headers? +

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

Can I rate-limit set_domain_headers? +

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

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

set_domain_headers 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.