listing_symbols_by_group

Get stock symbols in a market group. Args: group: Market group - VN30, HNX30, HOSE, HNX, UPCOM, VN100, VNALL, etc (default: VN30) source: Data source - VCI or KBS (default: VCI)

ServerVNStock Agent MCP Server
CategoryRead

How to control listing_symbols_by_group ↓

WHAT IT DOES

What listing_symbols_by_group does on VNStock Agent MCP Server

AI agents call listing_symbols_by_group 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.

THE RISK

Low Risk

Why listing_symbols_by_group needs a policy

This tool retrieves stock market symbols from a specified group (VN30, HNX30, etc.) without modifying, executing operations, or affecting financial transactions. It is a simple data lookup with no side effects, fitting the Read category. Severity is low because unauthorized disclosure of publicly available stock symbol listings poses minimal security risk.

From the tool's definition Tool name is 'listing_symbols_by_group' and description states 'Get stock symbols in a market group' with configurable parameters for group and data source. The verb 'Get' and action of retrieving/listing symbols indicates a read-only query operation.

Documented attack patterns abuse exactly the kind of access listing_symbols_by_group gives an agent:

POLICY

How to control listing_symbols_by_group

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 listing_symbols_by_group:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "listing_symbols_by_group": {}
  }
}

listing_symbols_by_group is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register VNStock Agent MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

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FAQ

Questions about listing_symbols_by_group

What does the listing_symbols_by_group tool do? +

Get stock symbols in a market group. Args: group: Market group - VN30, HNX30, HOSE, HNX, UPCOM, VN100, VNALL, etc (default: VN30) 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.

How do I enforce a policy on listing_symbols_by_group? +

Register the VNStock Agent MCP Server MCP server in PolicyLayer and add a rule for listing_symbols_by_group: 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.

What risk level is listing_symbols_by_group? +

listing_symbols_by_group is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit listing_symbols_by_group? +

Yes. Add a rate_limit block to the listing_symbols_by_group 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.

How do I block listing_symbols_by_group completely? +

Set action: deny in the PolicyLayer policy for listing_symbols_by_group. 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.

What MCP server provides listing_symbols_by_group? +

listing_symbols_by_group 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.

Enforce policy on every VNStock Agent MCP Server tool call.

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.

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21 VNStock Agent MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.