get_mom
AI agents call get_mom 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.
Although the server integrates with financial data, individual technical indicator retrieval tools are Read operations—they query and return data with no side effects, state changes, or financial transactions. The empty description lowers confidence slightly, but the naming pattern and sibling tools strongly suggest this is a data retrieval operation (likely the momentum technical indicator).
From the tool's definition Tool name 'get_mom' with empty description; context indicates it belongs to AlphaVantage financial data API. Similar tools on server (get_adosc, get_apo, get_aroon, get_atr) are technical indicators that retrieve data without side effects.
Attacks that exploit this kind of access
get_mom. 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_mom: 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_mom 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_mom 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_mom. 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_mom 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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