Return monthly time series in two json objects as data and
AI agents call get_monthly_adjusted 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 historical financial market data without modifying, deleting, or executing operations. It is a Read category tool. Severity is critical because financial market data is sensitive and frequently targeted by threat actors for unauthorized access, and an AI agent with unrestricted access could extract large volumes of market intelligence or sensitive fund information, creating significant…
From the tool's definition Tool name 'get_monthly_adjusted' and server description indicate retrieval of 'stock market data, technical indicators, and fundamental financial information' from AlphaVantage financial data API.
Attacks that exploit this kind of access
Return monthly time series in two json objects as data and. 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_monthly_adjusted: 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_monthly_adjusted 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_monthly_adjusted 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_monthly_adjusted. 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_monthly_adjusted 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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