The Directional Movement Index (DX) is a component of the ADX indicator, measuring the strength of the positive and negative directional movements in a security
AI agents call GetTimeSeriesDx 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.
GetTimeSeriesDx queries financial market data (technical analysis metrics) without modifying, deleting, or executing operations. It is purely informational/analytical retrieval. No financial transactions occur—this is data access for analysis purposes. The low severity reflects that misuse would only expose or retrieve data without direct harm.
From the tool's definition Tool retrieves historical time series data for a technical indicator (Directional Movement Index). The description indicates it 'measures' and 'provides' data—a read-only operation with no modification, deletion, or execution of external operations.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesDx 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 GetTimeSeriesDx:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesDx": {}
}
}GetTimeSeriesDx is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Directional Movement Index (DX) is a component of the ADX indicator, measuring the strength of the positive and negative directional movements in a security. 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 GetTimeSeriesDx: 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.
GetTimeSeriesDx 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 GetTimeSeriesDx 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 GetTimeSeriesDx. 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.
GetTimeSeriesDx 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.