find_instruments

Searches for instrument information by various criteria.

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/find-instruments.md

WHAT IT DOES

What find_instruments does on Open Stocks MCP

AI agents call find_instruments 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 find_instruments is rated Low

This tool retrieves or queries stock market instrument data (symbols, details, specifications) without creating, modifying, deleting, or executing any financial transactions. The verb 'searches' and 'information' clearly denote a read-only operation. While the server provides trading capabilities, this specific tool is purely informational lookup functionality.

From the tool's definition Tool name 'find_instruments' and description 'Searches for instrument information by various criteria' indicate a query/lookup operation with no data modification or execution of trades.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

find_instruments Allowed

find_instruments 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": {
    "find_instruments": {}
  }
}

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 find_instruments call is checked against it from then on.

FAQ

Questions about find_instruments

What does the find_instruments tool do? +

Searches for instrument information by various criteria. 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 find_instruments? +

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

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

Can I rate-limit find_instruments? +

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

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

find_instruments 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.

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