The Minimum (MIN) indicator calculates the lowest value of a data series over a specified period, often used to identify potential support levels or extreme price movements.
AI agents call GetTimeSeriesMin 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.
GetTimeSeriesMin is a technical analysis function that queries and processes existing financial time series data to compute a statistical indicator. It neither creates/modifies data (Write), executes arbitrary operations (Execute), deletes data (Destructive), nor moves money (Financial).
From the tool's definition Tool calculates and returns the minimum value over a specified period from financial market data—a read-only analytical operation that retrieves historical data without modifying, deleting, or executing external code.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesMin 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 GetTimeSeriesMin:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesMin": {}
}
}GetTimeSeriesMin is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Minimum (MIN) indicator calculates the lowest value of a data series over a specified period, often used to identify potential support levels or extreme price movements. 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 GetTimeSeriesMin: 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.
GetTimeSeriesMin 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 GetTimeSeriesMin 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 GetTimeSeriesMin. 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.
GetTimeSeriesMin 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.