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What qt_active_popup does on Qt
AI agents call qt_active_popup to retrieve information from Qt without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why qt_active_popup is rated Low
This tool queries the current state of UI widgets to determine if a popup or modal dialog is active. It is a read-only operation with no side effects, no code execution, and no data modification. The only potential risk is information disclosure about UI state, which is minimal in the context of debugging a PySide6 application that an AI agent already has access to interact with.
From the tool's definition Tool name 'qt_active_popup' and description 'Check for active popup or modal dialog widgets' indicate a query operation that retrieves state information about UI elements without modifying or triggering any actions.
Attacks that exploit this kind of access
The rule that runs qt_active_popup safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Qt, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For qt_active_popup, this is the rule to start with:
qt_active_popup is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Qt, apply this rule, and every qt_active_popup call is checked against it from then on.
Questions about qt_active_popup
Check for active popup or modal dialog widgets. It is categorised as a Read tool in the Qt MCP Server, which means it retrieves data without modifying state.
Register the Qt MCP server in PolicyLayer and add a rule for qt_active_popup: 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 Qt. Nothing to install.
qt_active_popup 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 qt_active_popup 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 qt_active_popup. 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.
qt_active_popup is provided by the Qt MCP server (0xcarbon/qt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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