Calculate the maximum buildable area (building envelope) for a lot given zoning constraints. USE WHEN: user asks 'how much can I build', 'max square footage', 'what's the buildable area', 'calculate the envelope', 'how big can my house be', or has specific lot dimensions and zoning rules they wan...
Part of the Buildability™ — Property Zoning & Buildability™ Intelligence server.
Free to start. No card required.
AI agents invoke calculate_buildable_envelope to trigger processes or run actions in Buildability™ — Property Zoning & Buildability™ Intelligence. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
calculate_buildable_envelope can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"calculate_buildable_envelope": {
"limits": [
{
"counter": "calculate_buildable_envelope_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Buildability™ — Property Zoning & Buildability™ Intelligence policy for all 8 tools.
These attack patterns abuse exactly the kind of access calculate_buildable_envelope gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Calculate the maximum buildable area (building envelope) for a lot given zoning constraints. USE WHEN: user asks 'how much can I build', 'max square footage', 'what's the buildable area', 'calculate the envelope', 'how big can my house be', or has specific lot dimensions and zoning rules they want to model. RETURNS: max buildable square feet, max number of stories, envelope dimensions (length × width × height), usable footprint, and coverage math. Takes lot area, setbacks, FAR, height limit, and coverage as inputs — a pure calculation tool, does not query data.. It is categorised as a Execute tool in the Buildability™ — Property Zoning & Buildability™ Intelligence MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Buildability™ — Property Zoning & Buildability™ Intelligence MCP server in PolicyLayer and add a rule for calculate_buildable_envelope: 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.
calculate_buildable_envelope is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the calculate_buildable_envelope 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_buildable_envelope. 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_buildable_envelope 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.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.