draw_shape · TradingView MCP: Risk & Policy

WHAT IT DOES

What draw_shape does on TradingView MCP

AI agents use draw_shape to create or update resources in TradingView MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your TradingView MCP environment.

WHY IT NEEDS A POLICY

Why draw_shape needs a policy

This tool creates a visual drawing/annotation on the chart. It modifies the chart state by adding a shape or line, which is a reversible write operation (the drawing can be deleted). No code execution, financial transactions, or irreversible destruction involved.

From the tool's definition "Draw a shape/line on the chart"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draw_shape Rate-limited

draw_shape stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "draw_shape": {
      "limits": [
        {
          "counter": "draw_shape_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches TradingView MCP, so you can run agents against it safely.

FAQ

Questions about draw_shape

What does the draw_shape tool do? +

Draw a shape/line on the chart. It is categorised as a Write tool in the TradingView MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on draw_shape? +

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

What risk level is draw_shape? +

draw_shape is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit draw_shape? +

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

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

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