Get balance sheet data for a company. Args: symbol: Stock ticker symbol (e.g. VNM, FPT, ACB) period: Reporting period - quarter or annual (default: quarter) source: Data source - VCI or KBS (default: VCI)
AI agents call financial_balance_sheet to retrieve information from VNStock Agent MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves historical financial data (balance sheet information) for a company without creating, modifying, deleting, or executing any operations. It is a pure read operation that provides no side effects beyond data retrieval. The parameters allow filtering by stock ticker, reporting period, and data source, but do not enable any state changes or external operations.
From the tool's definition Tool retrieves balance sheet data with parameters for symbol, period, and source. Description indicates 'Get balance sheet data' with no modification, deletion, or execution capabilities.
Documented attack patterns abuse exactly the kind of access financial_balance_sheet gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and VNStock Agent MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for financial_balance_sheet:
{
"version": "1",
"default": "deny",
"tools": {
"financial_balance_sheet": {}
}
}financial_balance_sheet is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get balance sheet data for a company. Args: symbol: Stock ticker symbol (e.g. VNM, FPT, ACB) period: Reporting period - quarter or annual (default: quarter) source: Data source - VCI or KBS (default: VCI). It is categorised as a Read tool in the VNStock Agent MCP Server MCP Server, which means it retrieves data without modifying state.
Register the VNStock Agent MCP Server MCP server in PolicyLayer and add a rule for financial_balance_sheet: 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 VNStock Agent MCP Server. Nothing to install.
financial_balance_sheet 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 financial_balance_sheet 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 financial_balance_sheet. 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.
financial_balance_sheet is provided by the VNStock Agent MCP Server MCP server (mrgoonie/vnstock-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from VNStock Agent MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
21 VNStock Agent MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.