The Stochastic Oscillator (STOCH) is a momentum indicator that compares a security
AI agents call GetTimeSeriesStoch 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 and calculates technical analysis indicators (Stochastic Oscillator) on historical market data. It has no side effects, does not modify data, execute operations, delete records, or move money. It is purely a read operation that returns computed financial metrics to the user.
From the tool's definition Tool name 'GetTimeSeriesStoch' begins with 'Get', indicating data retrieval. Description states it 'compares a security' as a momentum indicator, suggesting calculation and return of historical technical analysis data without modification or execution of…
Documented attack patterns abuse exactly the kind of access GetTimeSeriesStoch 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 GetTimeSeriesStoch:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesStoch": {}
}
}GetTimeSeriesStoch is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Stochastic Oscillator (STOCH) is a momentum indicator that compares 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 GetTimeSeriesStoch: 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.
GetTimeSeriesStoch 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 GetTimeSeriesStoch 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 GetTimeSeriesStoch. 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.
GetTimeSeriesStoch 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.