This record as markdown: /tools/0xcarbon-qt-mcp/qt-click.md
What qt_click does on Qt
AI agents invoke qt_click to trigger actions in Qt. 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 qt_click is rated High
Clicking a widget is an external operation whose effects depend on the target widget. It could trigger anything from harmless navigation to destructive actions within the application, making it Execute-category with medium severity due to the variable and context-dependent blast radius.
From the tool's definition 'Click a widget' — triggers a UI interaction (click) on a desktop application widget, causing side effects that depend on what the widget does (e.g., submitting forms, opening dialogs, triggering actions).
Attacks that exploit this kind of access
The rule that runs qt_click 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_click, this is the rule to start with:
qt_click 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Qt, apply this rule, and every qt_click call is checked against it from then on.
Questions about qt_click
Click a widget. It is categorised as a Execute tool in the Qt MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Qt MCP server in PolicyLayer and add a rule for qt_click: 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_click is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the qt_click 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_click. 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_click 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.
More on Qt, and thousands of servers like it.
This server
Across the catalogue