compute_catchpit
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_manhole. Precast concrete catchpit / silt trap to BS 5911-3 comprising factory-cast monolithic base with integr...
This record as markdown: /tools/com-civilquants-civilquants/compute-catchpit.md
What compute_catchpit does on Civilquants
AI agents call compute_catchpit 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 concrete catchpit / silt trap. Catalogue-driven: pick a ``size`` and the chamber's nominal dimensions, masses, and silt-sump depth |
standard | string | — | |
output_mode | string | — | |
deliverables | object | — |
Parameters from the server's own tool schema.
Why compute_catchpit is rated Low
This is a parametric estimating engine tool that computes Bills of Quantities for a catchpit assembly. It reads from a catalogue and performs calculations to return quantity estimates. There are no side effects such as writing data, executing commands, deleting records, or moving money.
From the tool's definition Precast concrete catchpit / silt trap... Catalogue-driven sizing from CP_900 — the tool computes/estimates quantities for a civil engineering assembly
Risk signalsHigh parameter count (37 properties)
Attacks that exploit this kind of access
The rule that runs compute_catchpit 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_catchpit, this is the rule to start with:
compute_catchpit 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_catchpit call is checked against it from then on.
Questions about compute_catchpit
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_manhole. Precast concrete catchpit / silt trap to BS 5911-3 comprising factory-cast monolithic base with integral silt sump (600-900mm below outlet invert), stacked precast chamber rings, precast cover slab, ductile-iron frame and cover (BS EN 124 loading classes), optional step irons, granular or concrete bedding, granular surround, geotextile separator, and excavation. Catalogue-driven sizing from CP_900 (900mm ID) to CP_1800 (1800mm ID). Routes via chamber_type='catchpit' attribute discrimination through CESMM4 K.1.6.x, NRM2 33.7.14, MMHW 500.5.16 (SHW Cl. 511 silt traps), and SMM7 R12.3.13. Distinct from manholes by the silt-sump-below-channel geometry; typical position upstream of petrol/oil interceptor (S24) in a forecourt or service-area drainage train. Example params: invert_depth=2.5 m (0.5–10), bedding_thickness_mm=150 mm (100–300), bedding_overhang_m=0.15 m (0.1–0.3). Example call: {"params": {"invert_depth": 2.5, "bedding_thickness_mm": 150, "bedding_overhang_m": 0.15}, "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_catchpit 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_catchpit: 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_catchpit 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_catchpit 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_catchpit. 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_catchpit 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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