AI agents call get_bond_yields 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 performs a simple data query operation to fetch publicly available bond yield information. There are no create, modify, delete, or execute operations. The data retrieved is static market information used for financial analysis calculations. Misuse would result in accessing non-sensitive public data only, with no ability to transact, modify systems, or cause financial harm.
From the tool's definition Tool retrieves Turkish government bond yields and risk-free rates for DCF calculations. Keywords: 'Get' indicates data retrieval; 'yields' and 'risk-free rate' are publicly available financial market data with no side effects, modifications, or state changes.
Attacks that exploit this kind of access
Get Turkish government bond yields (2Y, 5Y, 10Y) and risk-free rate for DCF calculations. 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_bond_yields: 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_bond_yields 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_bond_yields 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_bond_yields. 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_bond_yields 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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