# run-vehicle-governance-cascade

`station__microgram__run-vehicle-governance-cascade` · external (needs EXECUTION_BACKEND_URL configured) · domain `microgram` · pv-relevance `pv-core`

Run the governance cascade: KCL field balance → KVL loop conservation → reporting velocity governor. Checks data conservation laws then decides whether to fire the engine (run_now/wait/escalate). The throttle controller.

> **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

- `fields_in` *integer* (required) — Number of fields entering the chain step
- `fields_out` *integer* (required) — Number of fields leaving the chain step
- `collisions` *integer* — Number of field name collisions detected
- `accumulate_mode` *boolean* — Whether chain uses accumulate semantics
- `confidence_before` *number* (required) — Confidence at prior loop iteration (0.0-1.0)
- `confidence_after` *number* (required) — Confidence at current loop iteration (0.0-1.0)
- `new_evidence_fields` *integer* — New evidence fields added between iterations (0 = none)
- `current_rate` *number* (required) — Current reporting rate (reports per quarter)
- `signal_velocity` *string* (required) — Signal velocity: ACCELERATING, STABLE, DECELERATING, STALLED
- `hours_since_last_run` *integer* (required) — Hours since the chain was last executed
- `active_signals` *integer* — Number of currently active signals being tracked

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__microgram__run-vehicle-governance-cascade",
    "arguments": {
      "fields_in": 0,
      "fields_out": 0,
      "confidence_before": 0,
      "confidence_after": 0,
      "current_rate": 0,
      "signal_velocity": "",
      "hours_since_last_run": 0
    }
  }
}
```

## Related

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