The Linear Regression Slope (LINEARREGSLOPE) measures the steepness of the linear regression line, indicating the rate of change of the underlying trend.
AI agents call GetTimeSeriesLinearRegSlope 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 performs a read-only statistical computation on historical time series data. It retrieves data, applies a mathematical formula (linear regression slope calculation), and returns the result. There are no side effects, no data modifications, no code execution, no deletions, and no financial transactions.
From the tool's definition Tool name 'GetTimeSeriesLinearRegSlope' and description explicitly state it 'measures the steepness of the linear regression line' — a statistical calculation that retrieves and analyzes existing financial market data without modifying, executing external…
Documented attack patterns abuse exactly the kind of access GetTimeSeriesLinearRegSlope 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 GetTimeSeriesLinearRegSlope:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesLinearRegSlope": {}
}
}GetTimeSeriesLinearRegSlope is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Linear Regression Slope (LINEARREGSLOPE) measures the steepness of the linear regression line, indicating the rate of change of the underlying trend. 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 GetTimeSeriesLinearRegSlope: 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.
GetTimeSeriesLinearRegSlope 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 GetTimeSeriesLinearRegSlope 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 GetTimeSeriesLinearRegSlope. 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.
GetTimeSeriesLinearRegSlope 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.