list_brokers

Lists all registered brokers and their availability.

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/list-brokers.md

WHAT IT DOES

What list_brokers does on Open Stocks MCP

AI agents call list_brokers 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 list_brokers is rated Low

This tool retrieves and displays information about available brokers without creating, modifying, deleting, or executing any operations. It is a purely informational read operation with minimal blast radius if misused—an AI agent cannot cause harm by listing brokers. The low severity reflects that this is passive data retrieval.

From the tool's definition Tool name 'list_brokers' and description 'Lists all registered brokers and their availability' indicate a query/retrieval operation with no data modification or execution.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

list_brokers Allowed

list_brokers 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": {
    "list_brokers": {}
  }
}

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 list_brokers call is checked against it from then on.

FAQ

Questions about list_brokers

What does the list_brokers tool do? +

Lists all registered brokers and their availability. 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 list_brokers? +

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

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

Can I rate-limit list_brokers? +

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

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

list_brokers 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

aiva_list_affiliates on AIVA MCP Server →list_circuits on 0gzk →list_agents on 0rca Dojo MCP Server → The MCP Attack Database →

Guides

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