The Typical Price (TYPPRICE) indicator calculates the average of a security
AI agents call GetTimeSeriesTypPrice 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 calculated indicator values (Typical Price averages) from historical or real-time market data. It performs no mutations, deletions, financial transactions, or code execution—purely data retrieval with no side effects. The security context (financial markets) does not change its category; financial data access without transaction capability remains in the Read category.
From the tool's definition Tool name 'GetTimeSeriesTypPrice' indicates retrieval of time series data using the Typical Price indicator. Description states it 'calculates the average of a security', which is a read-only data retrieval operation.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesTypPrice 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 GetTimeSeriesTypPrice:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesTypPrice": {}
}
}GetTimeSeriesTypPrice is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Typical Price (TYPPRICE) indicator calculates the average of 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 GetTimeSeriesTypPrice: 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.
GetTimeSeriesTypPrice 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 GetTimeSeriesTypPrice 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 GetTimeSeriesTypPrice. 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.
GetTimeSeriesTypPrice 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.