The Chande Momentum Oscillator (CMO) is a momentum indicator that measures the relative strength of up and down price movements, helping traders identify overbought or oversold conditions and potential trend reversals.
AI agents call GetTimeSeriesCmo 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.
GetTimeSeriesCmo retrieves and calculates technical analysis metrics from existing financial market data. It has no side effects, does not execute code or commands, does not create, modify, or delete data, and does not involve financial transactions. The tool simply queries and returns computed indicator values to support trading analysis. This is a straightforward Read operation with minimal security risk.
From the tool's definition Tool provides historical technical indicator data (Chande Momentum Oscillator) from Twelve Data API without modifying any data. The description explicitly states it 'measures' and 'helps identify' conditions, which are analytical/retrieval operations.
Documented attack patterns abuse exactly the kind of access GetTimeSeriesCmo 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 GetTimeSeriesCmo:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesCmo": {}
}
}GetTimeSeriesCmo is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
The Chande Momentum Oscillator (CMO) is a momentum indicator that measures the relative strength of up and down price movements, helping traders identify overbought or oversold conditions and potential trend reversals. 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 GetTimeSeriesCmo: 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.
GetTimeSeriesCmo 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 GetTimeSeriesCmo 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 GetTimeSeriesCmo. 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.
GetTimeSeriesCmo 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.