The McGinley Dynamic (MCGINLEY_DYNAMIC) indicator is a smoothing tool designed to minimize the lag between the indicator and price action. It adjusts its speed based on the volatility of the security, providing a more accurate representation of price trends and potential support or resistance lev...
AI agents call GetTimeSeriesMcGinleyDynamic 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 is a read-only financial data retrieval tool. It accesses historical market data to compute a technical analysis indicator. There are no side effects, data modifications, code execution, deletions, or financial transactions involved. The risk is minimal as it only retrieves and transforms existing data for analytical purposes.
From the tool's definition The tool retrieves and calculates the McGinley Dynamic technical indicator from historical time series data. It 'provides' trend analysis and indicator values without modifying, deleting, or executing external operations.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesMcGinleyDynamic 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 GetTimeSeriesMcGinleyDynamic:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesMcGinleyDynamic": {}
}
}GetTimeSeriesMcGinleyDynamic is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The McGinley Dynamic (MCGINLEY_DYNAMIC) indicator is a smoothing tool designed to minimize the lag between the indicator and price action. It adjusts its speed based on the volatility of the security, providing a more accurate representation of price trends and potential support or resistance levels compared to traditional moving averages. 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 GetTimeSeriesMcGinleyDynamic: 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.
GetTimeSeriesMcGinleyDynamic 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 GetTimeSeriesMcGinleyDynamic 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 GetTimeSeriesMcGinleyDynamic. 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.
GetTimeSeriesMcGinleyDynamic 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.