The Balance of Power (BOP) indicator measures the balance between buying and selling pressure in a security by comparing its open, high, low, and close prices, helping traders identify potential price trends.
AI agents call GetTimeSeriesBop 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.
GetTimeSeriesBop is a financial market analysis tool that reads and computes a technical indicator (Balance of Power) from historical price data. It retrieves data and performs calculations on that data, with no side effects, no code execution, and no financial transactions. This is purely informational data access, fitting the Read category.
From the tool's definition Tool description states it 'measures the balance between buying and selling pressure' and 'helps traders identify potential price trends' — operations that retrieve and analyze existing market data without modifying, executing external operations, or…
Documented attack patterns abuse exactly the kind of access GetTimeSeriesBop 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 GetTimeSeriesBop:
{
"version": "1",
"default": "deny",
"tools": {
"GetTimeSeriesBop": {}
}
}GetTimeSeriesBop is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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The Balance of Power (BOP) indicator measures the balance between buying and selling pressure in a security by comparing its open, high, low, and close prices, helping traders identify potential price trends. 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 GetTimeSeriesBop: 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.
GetTimeSeriesBop 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 GetTimeSeriesBop 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 GetTimeSeriesBop. 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.
GetTimeSeriesBop 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.