margin_interest

Gets margin interest charges and rates.

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/margin-interest.md

WHAT IT DOES

What margin_interest does on Open Stocks MCP

AI agents call margin_interest 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 margin_interest is rated Low

This tool retrieves financial data (margin interest charges and rates) but does not modify account state, execute trades, move money, or delete data. It is purely informational, analogous to querying account details or viewing portfolio information. While the data is finance-related, the tool itself performs no financial transaction or obligation.

From the tool's definition Tool name 'margin_interest' and description 'Gets margin interest charges and rates' indicate a retrieval operation with no side effects. The verb 'Gets' explicitly denotes a query action.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

margin_interest Allowed

margin_interest 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": {
    "margin_interest": {}
  }
}

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 margin_interest call is checked against it from then on.

FAQ

Questions about margin_interest

What does the margin_interest tool do? +

Gets margin interest charges and rates. 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 margin_interest? +

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

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

Can I rate-limit margin_interest? +

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

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

margin_interest 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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