options_chains

Gets complete option chains for a stock symbol.

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/options-chains.md

WHAT IT DOES

What options_chains does on Open Stocks MCP

AI agents call options_chains 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 options_chains is rated Low

This tool queries and returns option chain market data without creating, modifying, deleting, or executing transactions. It is a standard market data retrieval function with no side effects. The 'Read' category applies to tools that retrieve or query data.

From the tool's definition Tool retrieves option chain data for a stock symbol with no modification capability implied by 'Gets' and 'for a stock symbol'. The tool name and description indicate data retrieval only.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

options_chains Allowed

options_chains 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": {
    "options_chains": {}
  }
}

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 options_chains call is checked against it from then on.

FAQ

Questions about options_chains

What does the options_chains tool do? +

Gets complete option chains for a stock symbol. 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 options_chains? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for options_chains: 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 options_chains? +

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

Can I rate-limit options_chains? +

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

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

options_chains 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

More on Open Stocks, and thousands of servers like it.

This server

All 152 Open Stocks tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →