proxy_update_target · Web Proxy MCP Server MCP

WHAT IT DOES

What proxy_update_target does on Web Proxy MCP Server

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

WHY IT NEEDS A POLICY

Why proxy_update_target needs a policy

The tool modifies proxy target domain configuration, which is a reversible Write operation. However, it has high severity because misconfiguration could redirect traffic maliciously, intercept sensitive data, or disrupt network operations. The capability to update routing rules is a high-impact configuration change that could affect all downstream traffic flowing through this proxy.

From the tool's definition Tool name 'proxy_update_target' and description 'Update target domain configuration' indicate modification of proxy routing rules or target settings.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

proxy_update_target Rate-limited

proxy_update_target 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": {
    "proxy_update_target": {
      "limits": [
        {
          "counter": "proxy_update_target_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 Proxy MCP Server, so you can run agents against it safely.

FAQ

Questions about proxy_update_target

What does the proxy_update_target tool do? +

Update target domain configuration. It is categorised as a Write tool in the Web Proxy 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 proxy_update_target? +

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

What risk level is proxy_update_target? +

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

Can I rate-limit proxy_update_target? +

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

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

proxy_update_target is provided by the Web Proxy MCP Server MCP server (mako10k/mcp-web-proxy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.