The True Range (TRANGE) indicator measures the range of price movement over a specified period, providing a volatility measure that helps traders identify potential trading opportunities and risk management.
AI agents call GetTimeSeriesTRange to retrieve information from Twelve Data MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves pre-calculated or computed financial market data (True Range indicator values) for analysis purposes. It queries historical price data to derive a volatility metric, which is a read-only operation with no side effects. The data retrieved helps inform trading decisions but does not execute trades, modify data, or commit financial obligations.
From the tool's definition Tool name 'GetTimeSeriesTRange' and description indicate retrieval of technical indicator data ('measures the range of price movement').
Documented attack patterns abuse exactly the kind of access GetTimeSeriesTRange gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Twelve Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for GetTimeSeriesTRange:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesTRange": {}
}
}GetTimeSeriesTRange is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The True Range (TRANGE) indicator measures the range of price movement over a specified period, providing a volatility measure that helps traders identify potential trading opportunities and risk management. It is categorised as a Read tool in the Twelve Data MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Twelve Data MCP Server MCP server in PolicyLayer and add a rule for GetTimeSeriesTRange: 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 Twelve Data MCP Server. Nothing to install.
GetTimeSeriesTRange is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the GetTimeSeriesTRange 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 GetTimeSeriesTRange. 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.
GetTimeSeriesTRange is provided by the Twelve Data MCP Server MCP server (twelvedata/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 186 Twelve Data MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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186 Twelve Data MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.