Get complete set of exchange-traded funds data based on the unique identifier code of an ETF.
AI agents call get_etf_holdings to retrieve information from Marketstack 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 ETF holdings information based on an identifier. It performs no side effects, does not modify or delete data, does not execute code, and does not involve financial transactions. While it provides access to financial data, the tool itself merely queries and returns information without committing any financial obligations or executing operations.
From the tool's definition Tool name 'get_etf_holdings' and description 'Get complete set of exchange-traded funds data' indicate a retrieval operation with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Get complete set of exchange-traded funds data based on the unique identifier code of an ETF. It is categorised as a Read tool in the Marketstack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Marketstack MCP Server MCP server in PolicyLayer and add a rule for get_etf_holdings: 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 Marketstack MCP Server. Nothing to install.
get_etf_holdings 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_etf_holdings 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_etf_holdings. 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_etf_holdings is provided by the Marketstack MCP Server MCP server (matteoantoci/mcp-marketstack). 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.
Teams ship this data inside their own products. See what a licence covers →