AI agents call is-displayed to retrieve information from WDIO MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only inspection of page state (whether an element is visible), similar to checking a property or attribute. It has no side effects, does not modify data, does not execute code, and does not interact with external systems. It is informational only, making it a Read category tool with low severity risk.
From the tool's definition Tool description states 'Check if an element is displayed on the page' - this is a query/inspection operation that retrieves the visibility state of a DOM element without modifying or executing any actions.
Documented attack patterns abuse exactly the kind of access is-displayed gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and WDIO MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for is-displayed:
{
"version": "1",
"default": "deny",
"tools": {
"is-displayed": {}
}
}is-displayed is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check if an element is displayed on the page. It is categorised as a Read tool in the WDIO MCP Server MCP Server, which means it retrieves data without modifying state.
Register the WDIO MCP Server MCP server in PolicyLayer and add a rule for is-displayed: 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 WDIO MCP Server. Nothing to install.
is-displayed is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the is-displayed 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.
Set action: deny in the PolicyLayer policy for is-displayed. 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.
is-displayed is provided by the WDIO MCP Server MCP server (siri100/wdio-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from WDIO MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 WDIO MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.