Get details for a specific stock market index.
AI agents call get_index_info 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 market index information without modifying, executing, or deleting any data. It is a straightforward data lookup operation consistent with other read-only tools on the Marketstack server (get_ticker_details, get_exchange_details, etc.). The blast radius of misuse is minimal—an agent could only retrieve unwanted index data, not cause financial transactions, code execution, or data destruction.
From the tool's definition Tool name 'get_index_info' and description 'Get details for a specific stock market index' indicate a retrieval operation with no side effects. The verb 'get' and the informational nature (details/data retrieval) confirm this is a read-only query.
Attacks that exploit this kind of access
Get details for a specific stock market index. 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_index_info: 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_index_info 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_index_info 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_index_info. 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_index_info 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.
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