ui_fullscreen

THE RISK

High Risk

This tool executes a UI action (toggling fullscreen) in an external application. It has no data read/write implications and is not destructive or financial, but it does trigger an external operation whose effect depends on the current state. Severity is low as it only affects display mode with no data or financial impact.

From the tool's definition Toggle TradingView fullscreen mode — triggers an external UI operation in the TradingView Desktop application via Chrome DevTools Protocol

Documented attack patterns abuse exactly the kind of access ui_fullscreen gives an agent:

HOW TO CONTROL UI_FULLSCREEN

PolicyLayer is an MCP gateway — it sits between your AI agents and TradingView MCP Bridge, and nothing reaches the server without passing your rules. This is the rule we recommend for ui_fullscreen:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ui_fullscreen": {
      "limits": [
        {
          "counter": "ui_fullscreen_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

ui_fullscreen 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.

Create a free account and register TradingView MCP Bridge — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More TradingView MCP Bridge tools

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All 78 TradingView MCP Bridge tools →

Execute tools on other servers

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Go deeper

High-risk tools in TradingView MCP Bridge → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the ui_fullscreen tool do? +

Toggle TradingView fullscreen mode. It is categorised as a Execute tool in the TradingView MCP Bridge MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on ui_fullscreen? +

Register the TradingView MCP Bridge MCP server in PolicyLayer and add a rule for ui_fullscreen: 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 TradingView MCP Bridge. Nothing to install.

What risk level is ui_fullscreen? +

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

Can I rate-limit ui_fullscreen? +

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

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

ui_fullscreen is provided by the TradingView MCP Bridge MCP server (tradesdontlie/tradingview-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every TradingView MCP Bridge tool call.

Deterministic rules across all 78 TradingView MCP Bridge tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN TRADINGVIEW MCP BRIDGE →

Free to start. No card required.

78 TradingView MCP Bridge tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT UI_FULLSCREEN ON TRADINGVIEW MCP BRIDGE DOES

// THE RISK

// HOW TO CONTROL UI_FULLSCREEN

// EXPLORE