# run-gyroscopic-stability

`station__microgram__run-gyroscopic-stability` · external (needs EXECUTION_BACKEND_URL configured) · domain `microgram` · pv-relevance `pv-core`

Flywheel gyroscopic stability classifier. STABLE (ratio > 2.0), PRECESSING (ratio 1.0-2.0), GIMBAL_LOCK (ratio <= 1.0), NO_STABILITY (|L| < critical). Requires pre-computed momentum_below_critical (1=below, 0=at-or-above) and stability_ratio = |L|/|perturbation| (use 999.0 for zero perturbation).

> **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

- `stability_ratio` *number* (required) — Input parameter: stability_ratio
- `perturbation_torque` *number* (required) — Input parameter: perturbation_torque
- `momentum_below_critical` *integer* (required) — Input parameter: momentum_below_critical
- `momentum_L` *number* (required) — Input parameter: momentum_L
- `critical_momentum` *number* (required) — Input parameter: critical_momentum

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__microgram__run-gyroscopic-stability",
    "arguments": {
      "stability_ratio": 0,
      "perturbation_torque": 0,
      "momentum_below_critical": 0,
      "momentum_L": 0,
      "critical_momentum": 0
    }
  }
}
```

## Related

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