AI agents call get_index_data to retrieve information from Borsa MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward data query tool that fetches market index information and constituent stock data. It has no side effects—it neither modifies financial data, executes transactions, nor triggers external operations. The severity is low because misuse (e.g., an agent querying indices repeatedly) poses minimal operational or financial risk.
From the tool's definition Tool retrieves 'index value, change, and optionally component stocks' from financial markets. Language indicates data retrieval with no modification, creation, deletion, or execution of trades/commands.
Attacks that exploit this kind of access
Get index value, change, and optionally component stocks (BIST: XU100, XU030; US: SPY, QQQ). It is categorised as a Read tool in the Borsa MCP MCP Server, which means it retrieves data without modifying state.
Register the Borsa MCP server in PolicyLayer and add a rule for get_index_data: 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 Borsa MCP. Nothing to install.
get_index_data 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_data 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_data. 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_data is provided by the Borsa MCP server (saidsurucu/borsa-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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