# compute_carrier_pipe_run

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. Linear carrier-pipe measurement assembly with full four-standard depth-banded rendering. CESMM4 Class I (I.{material}.{bore}.{depth}, 9 depth bands), NRM2 Group 33 (33.1.{bore}.{depth}, equivalent banding), MMHW Series 500 (500.1.{bore}.{depth}, 11 depth bands extending to 6 m for highway-scale carriers per SHW Cl. 501), SMM7 R12 (R12.1.{bore}.{depth}, 10 depth bands starting at 1 m for housing-scale carriers). Twelve variant presets exercise all 9 CESMM4 Class I depth bands and all 5 carrier materials (vitrified clay / concrete / HDPE / ductile iron / uPVC) — 12 × 4 = 48 distinguishable BoQ rows from a single parameter form. 19th use of the classed-then-legacy attribute discrimination pattern, FIRST applied to a Class I (Pipework) category — discriminator here is material itself, with the CESMM4 handler routing through the 5 Class I material sub-class digits while NRM2/MMHW/SMM7 stay within their respective groups but distinguish material in the description. Companion assembly: connection_to_existing (S32 sibling pair) — the enumerated extra-over connection line that ties a carrier run into an adopted asset. Example params: diameter_mm=225 mm (100–2400), invert_depth_m=1.8 m (0.5–10), run_length_m=30 m (1–2000). Example call: {"params": {"diameter_mm": 225, "invert_depth_m": 1.8, "run_length_m": 30}, "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).

Agent View of the PolicyLayer registry record for `compute_carrier_pipe_run`. HTML page: https://policylayer.com/tools/com-civilquants-civilquants/compute-carrier-pipe-run

## Facts

- Tool: `compute_carrier_pipe_run`
- Server: Civilquants (`https://api.civilquants.com/mcp`) — https://policylayer.com/tools/com-civilquants-civilquants.md
- Homepage: https://github.com/https://api.civilquants.com/mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 4 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `params` | object | yes | Parameters for a carrier pipe run. Geometric defaults yield a DN225 vitrified clay carrier at 1.8 m average invert depth over a 30 m run — the textbook small-c |
| `standard` | string | no |  |
| `output_mode` | string | no |  |
| `deliverables` | object | no |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "compute_carrier_pipe_run",
    "arguments": {
      "params": {}
    }
  }
}
```

## Why compute_carrier_pipe_run is rated Low

The tool performs parametric estimating calculations and renders measurement outputs (Bills of Quantities) for civil engineering carrier pipe runs. It reads/computes data based on input parameters and returns structured measurement results. There is no indication it writes, modifies, executes code, deletes data, or moves money — it is a calculation/retrieval engine.

From the tool's own definition: "Linear carrier-pipe measurement assembly with full four-standard depth-banded rendering — this tool computes and returns Bills of Quantities measurements/estimates across CESMM4, NRM2, MMHW, SMM7 standards"

Risk signals: High parameter count (11 properties)

## Use case

AI agents call compute_carrier_pipe_run 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.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Civilquants:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "compute_carrier_pipe_run": {}
  }
}
```

## Other tools on Civilquants (55)

- `compute_box_culvert` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-box-culvert.md
- `compute_combined_services_trench` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-combined-services-trench.md
- `compute_connection_to_existing` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-connection-to-existing.md
- `compute_ditch` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-ditch.md
- `compute_embankment_cross_section` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-embankment-cross-section.md
- `compute_end_area_earthworks` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-end-area-earthworks.md
- `compute_gabion_wall` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-gabion-wall.md
- `compute_headwall_attenuation_outlet` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-headwall-attenuation-outlet.md
- `compute_highway_drainage_channel` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-highway-drainage-channel.md
- `compute_lighting_column` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-lighting-column.md
- `compute_multi_section_assembly` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-multi-section-assembly.md
- `compute_pad_foundation` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-pad-foundation.md
- `compute_parapet` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-parapet.md
- `compute_pipe_bedding` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-pipe-bedding.md
- `compute_reinforced_soil_wall` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-reinforced-soil-wall.md
- `compute_road_marking` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-road-marking.md
- `compute_single_service_run` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-single-service-run.md
- `compute_soakaway` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-soakaway.md
- `compute_soil_nailed_slope` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-soil-nailed-slope.md
- `compute_traffic_sign` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-traffic-sign.md
- `compute_utility_chamber` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-utility-chamber.md
- `compute_utility_kiosk_base` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/compute-utility-kiosk-base.md
- `recompute_project` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/recompute-project.md
- `render_skill_report` — Execute — https://policylayer.com/tools/com-civilquants-civilquants/render-skill-report.md
- `compute_attenuation_tank` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-attenuation-tank.md
- `compute_bored_pile_wall` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-bored-pile-wall.md
- `compute_cantilever_wall` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-cantilever-wall.md
- `compute_catchpit` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-catchpit.md
- `compute_edge_drain` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-edge-drain.md
- `compute_flexible_pavement` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-flexible-pavement.md
- …and 25 more: https://policylayer.com/tools/com-civilquants-civilquants.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-civilquants-civilquants · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-civilquants-civilquants