compare_loans

THE RISK

Low Risk

Why compare_loans needs a policy

This tool performs comparative analysis of mortgage loan options. It retrieves and presents loan scenario data for evaluation purposes, with no capability to execute transactions, modify loan agreements, delete data, or commit financial obligations. The function is informational and advisory in nature, similar to other educational calculator tools on the RealVest server.

From the tool's definition Tool name is 'compare_loans' and description states it 'Compare[s] multiple mortgage loan scenarios side by side to find the best option'. The verb 'compare' indicates data retrieval and analysis without modification.

Documented attack patterns abuse exactly the kind of access compare_loans gives an agent:

POLICY

How to control compare_loans

PolicyLayer is an MCP gateway — it sits between your AI agents and RealVest Real Estate MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for compare_loans:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "compare_loans": {}
  }
}

compare_loans is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register RealVest Real Estate MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More RealVest Real Estate MCP Server tools

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All 33 RealVest Real Estate MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about compare_loans

What does the compare_loans tool do? +

Compare multiple mortgage loan scenarios side by side to find the best option. It is categorised as a Read tool in the RealVest Real Estate MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on compare_loans? +

Register the RealVest Real Estate MCP Server MCP server in PolicyLayer and add a rule for compare_loans: 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 RealVest Real Estate MCP Server. Nothing to install.

What risk level is compare_loans? +

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

Can I rate-limit compare_loans? +

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

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

compare_loans is provided by the RealVest Real Estate MCP Server MCP server (sigaihealth/realvestmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every RealVest Real Estate MCP Server tool call.

Start from RealVest Real Estate MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →