compute_headwall_precast
Paid tier only. Calling this without an authenticated CivilQuants account returns TIER_INSUFFICIENT — sign up at https://civilquants.com/pricing or use the free-tier alternative compute_headwall. Precast concrete outfall headwall, supplied as a whole unit from a UK manufacturer (Marshalls CPM, FP...
This record as markdown: /tools/com-civilquants-civilquants/compute-headwall-precast.md
What compute_headwall_precast does on Civilquants
AI agents call compute_headwall_precast to retrieve information from Civilquants without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
params | object | Yes | Parameter form for a precast headwall. Catalogue-driven: pick a `size` and the unit's nominal physical dimensions are read from `_CATALOGUE`. Override individu |
standard | string | — | |
output_mode | string | — | |
deliverables | object | — |
Parameters from the server's own tool schema.
Why compute_headwall_precast is rated Low
This tool performs parametric cost/quantity estimation by computing quantities for a precast headwall assembly. It reads from a catalogue and routes items through measurement standards to produce a BoQ output. No data is written, deleted, or executed; it is a calculation/query tool that returns structured estimate data.
From the tool's definition Parametric estimating engine... Catalogue-driven sizing... Routes precast unit through CESMM4 Class H, NRM2 33.9.1, MMHW 500.8.1, SMM7 R — tool computes and returns a bill of quantities estimate
Risk signalsHigh parameter count (25 properties)
Attacks that exploit this kind of access
The rule that runs compute_headwall_precast safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Civilquants, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For compute_headwall_precast, this is the rule to start with:
compute_headwall_precast is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Civilquants, apply this rule, and every compute_headwall_precast call is checked against it from then on.
Questions about compute_headwall_precast
Paid tier only. Calling this without an authenticated CivilQuants account returns TIER_INSUFFICIENT — sign up at https://civilquants.com/pricing or use the free-tier alternative compute_headwall. Precast concrete outfall headwall, supplied as a whole unit from a UK manufacturer (Marshalls CPM, FP McCann, Stanton Bonna or equivalent). Catalogue-driven sizing from PHW_300 (300mm pipe ID) to PHW_1500 (1500mm). Includes excavation, concrete or granular bedding, and optional rock-armour scour protection. Routes precast unit through CESMM4 Class H, NRM2 33.9.1, MMHW 500.8.1 (SHW Cl. 511), and SMM7 R12.3.7 via headwall_type=precast attribute discrimination. Example params: bedding_thickness_mm=150 mm (75–300), bedding_overhang_m=0.15 m (0.075–0.3), working_space_each_side_m=0.45 m (0.3–1.5). Example call: {"params": {"bedding_thickness_mm": 150, "bedding_overhang_m": 0.15, "working_space_each_side_m": 0.45}, "standard": "MMHW"}. Omitted parameters use sensible engineering defaults. Pass deliverables=["xlsx","dxf","pdf"] (any subset) to also receive one-shot download URLs in the same call: Excel BoQ (both tiers, watermarked free) plus the dimensioned DXF (CAD) and PDF drawing sheets (paid tier). It is categorised as a Read tool in the Civilquants MCP Server, which means it retrieves data without modifying state.
compute_headwall_precast accepts 4 parameters: params, standard, output_mode, deliverables. Required: params. The full parameter table on this page comes from the server's own tool schema.
Register the Civilquants MCP server in PolicyLayer and add a rule for compute_headwall_precast: 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 Civilquants. Nothing to install.
compute_headwall_precast 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 compute_headwall_precast 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 compute_headwall_precast. 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.
compute_headwall_precast is provided by the Civilquants MCP server (https://api.civilquants.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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