Look up the zoning designation and development standards for any U.S. property address. USE WHEN: user asks 'what zone is this', 'what's the zoning', 'what can I build on this lot', 'is this residential or commercial', 'can I build a duplex here', or any question about permitted uses. RETURNS: zo...
Part of the Buildability™ — Property Zoning & Buildability™ Intelligence server.
Free to start. No card required.
AI agents call lookup_zoning to retrieve information from Buildability™ — Property Zoning & Buildability™ Intelligence 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 lookup_zoning 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": {
"lookup_zoning": {}
}
}See the full Buildability™ — Property Zoning & Buildability™ Intelligence policy for all 8 tools.
These attack patterns abuse exactly the kind of access lookup_zoning 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.
Look up the zoning designation and development standards for any U.S. property address. USE WHEN: user asks 'what zone is this', 'what's the zoning', 'what can I build on this lot', 'is this residential or commercial', 'can I build a duplex here', or any question about permitted uses. RETURNS: zone code (e.g., R-1, C-2, MU-3), zone description, permitted uses list, conditional uses, overlay districts, max FAR, max height, setbacks (front/side/rear), lot coverage, and parking requirements.. It is categorised as a Read tool in the Buildability™ — Property Zoning & Buildability™ Intelligence MCP Server, which means it retrieves data without modifying state.
Register the Buildability™ — Property Zoning & Buildability™ Intelligence MCP server in PolicyLayer and add a rule for lookup_zoning: 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 Buildability™ — Property Zoning & Buildability™ Intelligence. Nothing to install.
lookup_zoning 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 lookup_zoning 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 lookup_zoning. 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.
lookup_zoning is provided by the Buildability™ — Property Zoning & Buildability™ Intelligence MCP server (https://rnfonkwthefktfvfwypr.supabase.co/functions/v1/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Buildability™ — Property Zoning & Buildability™ Intelligence tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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