stock_level2_data

Gets Level II market data for a stock (Gold subscription required).

SERVEROpen Stocks MCP SOURCEopen-agent-tools/open-stocks-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/open-agent-tools-open-stocks-mcp/stock-level2-data.md

WHAT IT DOES

What stock_level2_data does on Open Stocks MCP

AI agents call stock_level2_data to retrieve information from Open Stocks MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why stock_level2_data is rated Low

Level II market data is real-time bid/ask information that is passively queried from market data feeds. The tool retrieves and displays market information without creating, modifying, executing commands, or affecting financial positions. No side effects or irreversible actions result from calling this tool.

From the tool's definition Tool name 'stock_level2_data' and description 'Gets Level II market data for a stock' indicate data retrieval with no modification or execution of trades.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs stock_level2_data safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Open Stocks MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For stock_level2_data, this is the rule to start with:

stock_level2_data Allowed

stock_level2_data is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "stock_level2_data": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Open Stocks MCP, apply this rule, and every stock_level2_data call is checked against it from then on.

FAQ

Questions about stock_level2_data

What does the stock_level2_data tool do? +

Gets Level II market data for a stock (Gold subscription required). It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on stock_level2_data? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for stock_level2_data: 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 Open Stocks MCP. Nothing to install.

What risk level is stock_level2_data? +

stock_level2_data is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit stock_level2_data? +

Yes. Add a rate_limit block to the stock_level2_data 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 stock_level2_data completely? +

Set action: deny in the PolicyLayer policy for stock_level2_data. 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 stock_level2_data? +

stock_level2_data is provided by the Open Stocks MCP server (open-agent-tools/open-stocks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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