The Average Directional Index (ADX) measures the strength of a trend, regardless of direction, helping traders determine if a market is trending or ranging.
AI agents call GetTimeSeriesAdx 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 performs a read-only query of financial market data from the Twelve Data API. It calculates and returns a technical indicator (ADX) for historical time series without creating, modifying, deleting, or executing any operations with side effects. No financial transactions, code execution, or irreversible operations are involved. This is a straightforward data retrieval operation with minimal risk.
From the tool's definition Tool retrieves and returns ADX (Average Directional Index) time series data—a technical analysis indicator.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesAdx 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 GetTimeSeriesAdx:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesAdx": {}
}
}GetTimeSeriesAdx is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Average Directional Index (ADX) measures the strength of a trend, regardless of direction, helping traders determine if a market is trending or ranging. 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 GetTimeSeriesAdx: 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.
GetTimeSeriesAdx 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 GetTimeSeriesAdx 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 GetTimeSeriesAdx. 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.
GetTimeSeriesAdx 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.
Free to start. No card required.
186 Twelve Data MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.