select · WebControl MCP: Risk & Policy

WHAT IT DOES

What select does on WebControl

AI agents invoke select to trigger actions in WebControl. 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 select needs a policy

Selecting a dropdown option is an interactive browser action that modifies the state of a web page form element and may trigger cascading effects (e.g., dynamic content loading, form validation, or subsequent submissions).

From the tool's definition 'Select a dropdown option by its ref ID' — triggers a browser UI interaction that changes page state and 'Returns updated page content'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

select Rate-limited

select 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": {
    "select": {
      "limits": [
        {
          "counter": "select_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 WebControl, so you can run agents against it safely.

FAQ

Questions about select

What does the select tool do? +

Select a dropdown option by its ref ID. Value can be option text or value. Returns updated page content. It is categorised as a Execute tool in the WebControl MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on select? +

Register the WebControl MCP server in PolicyLayer and add a rule for select: 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 WebControl. Nothing to install.

What risk level is select? +

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

Can I rate-limit select? +

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

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

select is provided by the WebControl MCP server (matansht/webcontrol). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.