capture_screenshot

Take a screenshot of the TradingView chart

SERVERTradingView MCP Bridge SOURCEbyeung888/tradingview-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/byeung888-tradingview-mcp/capture-screenshot.md

WHAT IT DOES

What capture_screenshot does on TradingView MCP Bridge

AI agents call capture_screenshot to retrieve information from TradingView MCP Bridge without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why capture_screenshot is rated Low

Screenshot capture is a passive data retrieval mechanism with no side effects on the trading system, chart state, or external systems. While screenshots could theoretically contain sensitive market data visible on screen, the operation itself is non-destructive, non-executable, and non-financial in nature. The risk is limited to information exposure rather than system modification or financial impact.

From the tool's definition Tool description states 'Take a screenshot of the TradingView chart' - this retrieves visual data from the chart without modifying state, creating side effects, or executing arbitrary operations. Screenshot capture is a read-only observation operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs capture_screenshot safely

PolicyLayer is an MCP gateway: it sits between your AI agents and TradingView MCP Bridge, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For capture_screenshot, this is the rule to start with:

capture_screenshot Allowed

capture_screenshot is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "capture_screenshot": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect TradingView MCP Bridge, apply this rule, and every capture_screenshot call is checked against it from then on.

FAQ

Questions about capture_screenshot

What does the capture_screenshot tool do? +

Take a screenshot of the TradingView chart. It is categorised as a Read tool in the TradingView MCP Bridge MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on capture_screenshot? +

Register the TradingView MCP Bridge MCP server in PolicyLayer and add a rule for capture_screenshot: 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 capture_screenshot? +

capture_screenshot is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit capture_screenshot? +

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

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

capture_screenshot is provided by the TradingView MCP Bridge MCP server (byeung888/tradingview-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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