# compute_anchored_wall

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_cantilever_wall. Anchored retaining wall — the only wall family member that pre-stresses the retained soil mass into the wall via post-tensioned ground anchors per BS EN 1537. Three structural variants: in-situ reinforced concrete (INSITU_RC, economic 5-10m); steel king-post-and-lagging (KING_POST, typical 4-8m, often temporary); driven sheet pile (SHEET_PILED, quays/cofferdams/deep basements). Eight VARIANT_PRESETS exercise the 'one parameter form, eight variants, four standards' moat #1 claim across all three structural variants. The in-situ RC body routes via wall_type='anchored' attribute discrimination: CESMM4 F.6.4, NRM2 11.3.4, MMHW 1700.4.3 (SHW Cl. 1709/1710), SMM7 E10.3.3. Ground anchors and stressing route to new specialist handlers (CESMM4 Class C; NRM2 Group 7; MMHW Series 1600; SMM7 D32). King-post sections to CESMM4 P.5 / NRM2 7.3 / MMHW 1600.3 / SMM7 D32; sheet piles to CESMM4 P.4 / NRM2 7.4 / MMHW 1600.4 / SMM7 D31; timber lagging to CESMM4 O.3 / NRM2 16.4 / MMHW 2500.7 / SMM7 G20.1. Example params: stem_height=6 m (2–15), stem_thickness=0.5 m (0–1.5), wall_length=25 m (5–200). Example call: {"params": {"stem_height": 6, "stem_thickness": 0.5, "wall_length": 25}, "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). Pass freeboard (clearance below the wall top, m) instead of the retained-height field to set the retained fill by clearance — the engine back-calculates it as stem − freeboard. Supplying both is rejected.

Agent View of the PolicyLayer registry record for `compute_anchored_wall`. HTML page: https://policylayer.com/tools/com-civilquants-civilquants/compute-anchored-wall

## Facts

- Tool: `compute_anchored_wall`
- 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: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 5 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `params` | object | yes | Parameter form for an anchored retaining wall. A single dataclass that — through combinations of its fields and the ``wall_form`` discriminator — produces all |
| `standard` | string | no |  |
| `freeboard` | object | 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_anchored_wall",
    "arguments": {
      "params": {}
    }
  }
}
```

## Why compute_anchored_wall is rated Medium

An AI agent can call compute_anchored_wall faster than any human can review: one bad instruction and it creates or modifies resources in Civilquants by the hundred, each call as confident as the last.

Risk signals: High parameter count (53 properties)

## Use case

AI agents use compute_anchored_wall to create or update resources in Civilquants, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Civilquants environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "compute_anchored_wall": {
      "limits": [
        {
          "counter": "compute_anchored_wall_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## 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_carrier_pipe_run` — Read — https://policylayer.com/tools/com-civilquants-civilquants/compute-carrier-pipe-run.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
- …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`

---

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