AI agents call get_crypto_market 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 tool retrieves cryptocurrency market information (ticker prices, order book snapshots, trade history, and OHLC candlestick data) from exchanges. It performs no writes, deletions, code execution, or financial transactions. The blast radius of misuse is minimal—an AI agent could only retrieve market data that is already publicly available, with no ability to place orders, transfer funds, or affect market state.
From the tool's definition Tool name 'get_crypto_market' and description indicates retrieval of market data: 'Get crypto ticker, orderbook, trades, or OHLC'. These are read-only operations that query and return financial market data without modification or execution capabilities.
Attacks that exploit this kind of access
Get crypto ticker, orderbook, trades, or OHLC from BtcTurk (TRY) or Coinbase (USD). 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_crypto_market: 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_crypto_market 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_crypto_market 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_crypto_market. 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_crypto_market 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.
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