# conservation-check

`station__helix__conservation-check` · external (needs EXECUTION_BACKEND_URL configured) · domain `helix` · pv-relevance `non-pv`

Validate ∃ = ∂(×(ς, ∅)) for a system. Inputs: boundary sharpness ∂ ∈ [0,1], state richness ς ∈ [0,1], void clarity ∅ ∈ [0,1]. Returns existence score ∃, classification, and which primitive is weakest.

> **Note:** This tool routes through an external execution backend. If `EXECUTION_BACKEND_URL` is unset on the server, calls return JSON-RPC error `-32603 "Tool execution backend not configured"`. Tools with `backend: native` execute in-process and are always callable.

## Agent metadata

- `idempotent`: unknown
- `read_only`: unknown
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `boundary` *number* (required) — ∂ — boundary sharpness [0,1]. How sharply defined is inside vs outside?
- `state` *number* (required) — ς — state richness [0,1]. How much observable state exists within the boundary?
- `void` *number* (required) — ∅ — void clarity [0,1]. How clearly defined is what the system is NOT?

## Example call

```json
POST /api/mcp
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__helix__conservation-check",
    "arguments": {
      "boundary": 0,
      "state": 0,
      "void": 0
    }
  }
}
```

## Related

- [/tools](/tools) — all 3062 tools
- [/tools/helix__conservation-check](/tools/helix__conservation-check) — HTML page
- [/tools/helix__conservation-check/json](/tools/helix__conservation-check/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide