Get company overview information (industry, market cap, description, etc). Args: symbol: Stock ticker symbol (e.g. VNM, FPT, ACB) source: Data source - VCI or KBS (default: VCI)
AI agents call company_overview 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 is a pure data retrieval operation. It queries and returns company metadata without creating, modifying, deleting, or executing any operations. The parameters are used only to filter which company data to retrieve. No financial transactions, code execution, or destructive actions are possible.
From the tool's definition Tool retrieves company overview information (industry, market cap, description, etc) with no modifications or side effects. Takes read-only arguments (symbol, source) and returns static company data.
Documented attack patterns abuse exactly the kind of access company_overview 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 company_overview:
{
"version": "1",
"default": "deny",
"tools": {
"company_overview": {}
}
}company_overview is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get company overview information (industry, market cap, description, etc). Args: symbol: Stock ticker symbol (e.g. VNM, FPT, ACB) 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 company_overview: 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.
company_overview 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 company_overview 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 company_overview. 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.
company_overview 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.