Run a deterministic, lender-grade quick check on a real-estate deal. Inputs: deal_type (FF | BRRRR | NC), purchase_price, arv_or_value (ARV for FF, refinance value for BRRRR, sellout for NC), rehab_budget, zip_code; optional annual_debt_service, noi_annual, units, units_to_hold. Returns a PASS / ...
Part of the Refpro Mcp server.
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AI agents call deal_quick_check to retrieve information from Refpro Mcp without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though deal_quick_check only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"deal_quick_check": {}
}
}See the full Refpro Mcp policy for all 3 tools.
These attack patterns abuse exactly the kind of access deal_quick_check gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Run a deterministic, lender-grade quick check on a real-estate deal. Inputs: deal_type (FF | BRRRR | NC), purchase_price, arv_or_value (ARV for FF, refinance value for BRRRR, sellout for NC), rehab_budget, zip_code; optional annual_debt_service, noi_annual, units, units_to_hold. Returns a PASS / MARGINAL / FAIL verdict, the key financial metrics for that deal type (MAO and margin for FF, TPC and DSCR for BRRRR, TPC plus margin or DSCR for NC), and a one-paragraph summary. Math is identical to the underwriting pipeline used in Refpro's full deal pack — no estimates, no rounding shortcuts.. It is categorised as a Read tool in the Refpro Mcp MCP Server, which means it retrieves data without modifying state.
Register the Refpro MCP server in PolicyLayer and add a rule for deal_quick_check: 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 Refpro Mcp. Nothing to install.
deal_quick_check 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 deal_quick_check 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 deal_quick_check. 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.
deal_quick_check is provided by the Refpro MCP server (https://mcp.refpro.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Refpro Mcp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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