Calculate how much house you can afford based on income, debts, and down payment
AI agents call calculate_affordability to retrieve information from RealVest Real Estate MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and computes affordability metrics from provided inputs. It performs no side effects, does not create, modify, or delete data, and does not execute code or trigger external operations. While it relates to financial planning, it does not move money or commit financial obligations—it merely analyzes and returns information.
From the tool's definition Tool description states 'Calculate how much house you can afford' based on input parameters (income, debts, down payment).
Documented attack patterns abuse exactly the kind of access calculate_affordability gives an agent:
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 calculate_affordability:
{
"version": "1",
"default": "deny",
"tools": {
"calculate_affordability": {}
}
}calculate_affordability is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Calculate how much house you can afford based on income, debts, and down payment. It is categorised as a Read tool in the RealVest Real Estate MCP Server MCP Server, which means it retrieves data without modifying state.
Register the RealVest Real Estate MCP Server MCP server in PolicyLayer and add a rule for calculate_affordability: 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.
calculate_affordability is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the calculate_affordability 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.
Set action: deny in the PolicyLayer policy for calculate_affordability. 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.
calculate_affordability 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.
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.
Free to start. No card required.
33 RealVest Real Estate MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.