Get list of all listed companies on Vietnamese stock exchanges
AI agents call list_companies to retrieve information from Vnstock MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves publicly available information about companies listed on Vietnamese stock exchanges. It performs a query operation that returns data without modifying, executing code, deleting, or affecting financial transactions. The action is read-only and carries minimal risk of misuse.
From the tool's definition Tool name 'list_companies' and description 'Get list of all listed companies on Vietnamese stock exchanges' indicate a data retrieval operation with no side effects.
Attacks that exploit this kind of access
Get list of all listed companies on Vietnamese stock exchanges. It is categorised as a Read tool in the Vnstock MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Vnstock MCP Server MCP server in PolicyLayer and add a rule for list_companies: 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 MCP Server. Nothing to install.
list_companies 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 list_companies 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 list_companies. 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.
list_companies is provided by the Vnstock MCP Server MCP server (vietnh/vnstock-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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