Returns the federal funds rate (interest rate) of the United States
AI agents call get_ffr to retrieve information from AlphaVantage 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 returns existing financial data (the US federal funds rate) without any capability to modify, execute operations, or commit financial obligations. It is a straightforward data query operation with no side effects, making it a Read category tool. Severity is low because querying public economic data poses minimal risk regardless of how an AI agent uses it.
From the tool's definition Tool name 'get_ffr' and description 'Returns the federal funds rate' indicates data retrieval with no parameters for modification or execution. The federal funds rate is a published public economic statistic.
Attacks that exploit this kind of access
Returns the federal funds rate (interest rate) of the United States. It is categorised as a Read tool in the AlphaVantage MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AlphaVantage MCP Server MCP server in PolicyLayer and add a rule for get_ffr: 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 AlphaVantage MCP Server. Nothing to install.
get_ffr 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 get_ffr 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 get_ffr. 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.
get_ffr is provided by the AlphaVantage MCP Server MCP server (lifejwang11/alphavantage-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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