# cao_comparer_versions

WHEN two versions of a house design must be compared: what the client, the architect or another agent changed, and what it changes to the quantities (the basis of a change order). Elements are matched by geometry (wall end points, wall and position of an opening, type and position of an object), never by their index, so deleting one wall does not report every following wall as modified. Returns added, removed and modified elements field by field, and the quantity take-off difference item by item.

Agent View of the PolicyLayer registry record for `cao_comparer_versions`. HTML page: https://policylayer.com/tools/fr-synergieloc-immobilier/cao-comparer-versions

## Facts

- Tool: `cao_comparer_versions`
- Server: Immobilier (`https://synergieloc.fr/mcp`) — https://policylayer.com/tools/fr-synergieloc-immobilier.md
- Homepage: https://github.com/https://synergieloc.fr/mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 3 (2 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `apres` | object | yes | The modified scene. |
| `avant` | object | yes | The original scene (same format as the other CAO tools). |
| `quantites` | boolean | no | Also compare the quantity take-off, item by item. |

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": "cao_comparer_versions",
    "arguments": {
      "apres": {},
      "avant": {}
    }
  }
}
```

## Why cao_comparer_versions is rated Medium

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

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Immobilier (69)

- `cao_energie` — Destructive — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-energie.md
- `cao_nomenclatures` — Destructive — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-nomenclatures.md
- `cao_verifier` — Destructive — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-verifier.md
- `cao_bibliotheque_familles` — Execute — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-bibliotheque-familles.md
- `cao_carnet` — Execute — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-carnet.md
- `cao_generer_ifc` — Execute — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-generer-ifc.md
- `cao_livrer` — Execute — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-livrer.md
- `cao_visite_camera` — Execute — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-visite-camera.md
- `bonnes_pratiques` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/bonnes-pratiques.md
- `cao_4d` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-4d.md
- `cao_devis` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-devis.md
- `cao_familles` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-familles.md
- `cao_ids_verifier` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-ids-verifier.md
- `cao_pdf` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-pdf.md
- `cao_rendu` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-rendu.md
- `cao_urbanisme` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-urbanisme.md
- `pack_partenaire` — Read — https://policylayer.com/tools/fr-synergieloc-immobilier/pack-partenaire.md
- `annonce_location` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/annonce-location.md
- `avenant_revision_irl` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/avenant-revision-irl.md
- `avis_echeance` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/avis-echeance.md
- `bon_intervention` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/bon-intervention.md
- `candidature_locataire` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/candidature-locataire.md
- `cao_bcf_ifc` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-bcf-ifc.md
- `cao_conflits_ifc` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-conflits-ifc.md
- `cao_copilote` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-copilote.md
- `cao_demo` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-demo.md
- `cao_documents` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-documents.md
- `cao_famille_essayer` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-famille-essayer.md
- `cao_familles_recharger` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-familles-recharger.md
- `cao_ferraillage` — Write — https://policylayer.com/tools/fr-synergieloc-immobilier/cao-ferraillage.md
- …and 39 more: https://policylayer.com/tools/fr-synergieloc-immobilier.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=fr-synergieloc-immobilier · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/fr-synergieloc-immobilier