# run-hub-orchestration-schema

`station__microgram__run-hub-orchestration-schema` · external (needs EXECUTION_BACKEND_URL configured) · domain `microgram` · pv-relevance `pv-core`

Component: Hub (Nucleus) — Spec §2.2. Schema validator for hub orchestration data completeness. Validates that module coordination metrics exist before attempting health classification.

> **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

- `event_bus_depth` *integer* (required) — Input parameter: event_bus_depth
- `cross_module_calls_30d` *integer* (required) — Input parameter: cross_module_calls_30d
- `active_modules` *integer* (required) — Input parameter: active_modules
- `failed_handoffs_30d` *integer* (required) — Input parameter: failed_handoffs_30d
- `orchestration_latency_ms` *number* (required) — Input parameter: orchestration_latency_ms

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__microgram__run-hub-orchestration-schema",
    "arguments": {
      "event_bus_depth": 0,
      "cross_module_calls_30d": 0,
      "active_modules": 0,
      "failed_handoffs_30d": 0,
      "orchestration_latency_ms": 0
    }
  }
}
```

## Related

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