AI agents call get_other_balances to retrieve information from KSEI MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial data without modifying, deleting, or executing transactions. However, severity is 'high' rather than 'low' because the data retrieved relates to sensitive financial holdings; an AI agent with unrestricted access could infer financial position, holdings distribution, or risk exposure, which could enable social engineering, targeted attacks, or privacy violations.
From the tool's definition Tool name 'get_other_balances' and description 'Get other financial instruments and investments' indicate a retrieval operation ('get') with no modification or deletion. The function queries portfolio data (other investments/instruments) without side effects.
Attacks that exploit this kind of access
Get other financial instruments and investments. It is categorised as a Read tool in the KSEI MCP MCP Server, which means it retrieves data without modifying state.
Register the KSEI MCP server in PolicyLayer and add a rule for get_other_balances: 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 KSEI MCP. Nothing to install.
get_other_balances 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_other_balances 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_other_balances. 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_other_balances is provided by the KSEI MCP server (nichsedge/ksei-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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