replay_start

THE RISK

High Risk

This tool executes a command that changes application state and triggers a replay operation in TradingView. While not immediately destructive or financial, it executes an external operation whose outcome (market data replay, automated trading logic execution) depends on supplied arguments. An agent could misuse this by replaying bars in ways that trigger unintended trades or analysis workflows.

From the tool's definition Tool description states 'Start bar replay mode' and the server enables 'workflow automation via Chrome DevTools Protocol'. The tool triggers an external operation (bar replay) whose effects depend on the date argument provided.

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

HOW TO CONTROL REPLAY_START

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 replay_start:

policy.json

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

replay_start 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

Destructive alert_delete Delete all alerts or open context menu for deletion Destructive draw_clear Remove all drawings from the chart Destructive draw_remove_one Remove a specific drawing by entity ID Execute batch_run Run an action across multiple symbols and/or timeframes Execute pine_compile Compile / add the current Pine Script to the chart Execute pine_smart_compile Intelligent compile: detects button, compiles, checks errors, reports study changes Execute replay_stop Stop replay and return to realtime Execute replay_trade Execute a trade action in replay mode (buy, sell, or close position)

All 78 TradingView MCP Bridge tools →

Execute tools on other servers

Frida Game Hacking MCP remove_breakpoint Procmon request_elevation WireMCP capture_packets Pentest Ai run_probe

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 replay_start tool do? +

Start bar replay mode, optionally at a specific date. 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 replay_start? +

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

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

Can I rate-limit replay_start? +

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

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

replay_start 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 REPLAY_START ON TRADINGVIEW MCP BRIDGE DOES

// THE RISK

// HOW TO CONTROL REPLAY_START

// EXPLORE