broker_comparison

Get side-by-side broker comparison for pricing, holdings, and orders.

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/broker-comparison.md

WHAT IT DOES

What broker_comparison does on Open Stocks MCP

AI agents call broker_comparison 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 broker_comparison is rated Low

This tool queries and presents existing financial data for analysis purposes. It has no side effects—it does not execute trades, modify account settings, delete data, or transfer funds. The operation is purely informational, making it a Read category tool with low severity, as misuse would only expose or compare existing data rather than cause financial harm or irreversible changes.

From the tool's definition The tool 'broker_comparison' retrieves and displays side-by-side comparison data for 'pricing, holdings, and orders' across brokers. The verbs 'Get' and 'comparison' indicate data retrieval without modification or execution.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

broker_comparison Allowed

broker_comparison 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": {
    "broker_comparison": {}
  }
}

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 broker_comparison call is checked against it from then on.

FAQ

Questions about broker_comparison

What does the broker_comparison tool do? +

Get side-by-side broker comparison for pricing, holdings, and orders. 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 broker_comparison? +

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

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

Can I rate-limit broker_comparison? +

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

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

broker_comparison 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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