get_obv · AlphaVantage MCP Server MCP: Risk & Policy

WHAT IT DOES

What get_obv does on AlphaVantage MCP Server

AI agents call get_obv 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.

WHY IT NEEDS A POLICY

Why get_obv needs a policy

OBV is a passive technical analysis indicator. The 'get_' prefix and sibling tools confirm this retrieves pre-calculated financial data with no side effects, modifications, or external operations triggered. Despite empty description, the context strongly indicates a simple data fetch operation.

From the tool's definition Tool name 'get_obv' (On-Balance Volume, a technical indicator) and server context (AlphaVantage financial data API providing 'access to stock market data, technical indicators').

Attacks that exploit this kind of access

Questions about get_obv

What does the get_obv tool do? +

get_obv. It is categorised as a Read tool in the AlphaVantage MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_obv? +

Register the AlphaVantage MCP Server MCP server in PolicyLayer and add a rule for get_obv: 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.

What risk level is get_obv? +

get_obv is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_obv? +

Yes. Add a rate_limit block to the get_obv 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.

How do I block get_obv completely? +

Set action: deny in the PolicyLayer policy for get_obv. 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.

What MCP server provides get_obv? +

get_obv 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.