option_market_data

Gets market data for a specific option contract.

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/option-market-data.md

WHAT IT DOES

What option_market_data does on Open Stocks MCP

AI agents call option_market_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 option_market_data is rated Low

This tool retrieves market data (quotes, prices, Greeks, etc.) for options contracts. It is a read-only query operation that returns information without side effects, modifying positions, or executing financial transactions. No money moves and no data is altered. This is a standard market data lookup operation common to financial APIs.

From the tool's definition Tool name is 'option_market_data' and description states 'Gets market data for a specific option contract.' The verb 'Gets' indicates retrieval of data with no modification or execution of trades.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs option_market_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 option_market_data, this is the rule to start with:

option_market_data Allowed

option_market_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": {
    "option_market_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 option_market_data call is checked against it from then on.

FAQ

Questions about option_market_data

What does the option_market_data tool do? +

Gets market data for a specific option contract. 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 option_market_data? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for option_market_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 option_market_data? +

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

Can I rate-limit option_market_data? +

Yes. Add a rate_limit block to the option_market_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 option_market_data completely? +

Set action: deny in the PolicyLayer policy for option_market_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 option_market_data? +

option_market_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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