New Your team’s decisions, in one playbook every coding agent works from. Never answer your agent twice

option_historicals

A read tool on the Open Stocks MCP server.

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-historicals.md

What option_historicals does on Open Stocks MCP

AI agents call option_historicals 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.

Why option_historicals is rated Low

The tool appears to fetch or query historical option pricing/performance data without modifying state. While the context is financial data, the operation itself is Read-only retrieval, not a Financial transaction. Low severity because historical data queries pose minimal risk if misused by an agent—they cannot move money or execute trades. Confidence is moderate due to the empty description.

From the tool's definition Tool name 'option_historicals' suggests retrieval of historical option data. The empty description limits certainty, but naming convention (historical + plural) and the context of a financial data server with no mutating verbs in the name indicate a query…

Questions about option_historicals

What does the option_historicals tool do? +

option_historicals is a read tool on the Open Stocks MCP server. 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_historicals? +

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

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

Can I rate-limit option_historicals? +

Yes. Add a rate_limit block to the option_historicals 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_historicals completely? +

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

option_historicals 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.

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

Across the catalogue

// THE MCP REGISTRY

PolicyLayer tracks 44,603 MCP servers and 515,000+ tools.

Every server has a live record: who publishes it, whether it answers without auth, its risk grade, every tool classified, the recommended policy. This page is one line of Open Stocks's. Pull the full record:

Teams ship this data inside their own products. See what a licence covers →

// GET IN TOUCH

Have a question or want to learn more? Send us a message.

Message sent.

We'll get back to you soon.