# run-compatibility-predictor

`station__microgram__run-compatibility-predictor` · external (needs EXECUTION_BACKEND_URL configured) · domain `microgram` · pv-relevance `pv-core`

Compatibility Predictor: predicts whether two micrograms will be cross-compatible based on empirical matrix findings. Encodes three discovered laws: (1) Complementarity — different operators predict higher compatibility, (2) Family affinity — same name family predicts compatibility, (3) Size asymmetry — different tree sizes predict compatibility. Derived from 2,047,657-run matrix analysis across 433 micrograms.

> **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

- `family_a` *string* (required) — Input parameter: family_a
- `size_a` *integer* (required) — Input parameter: size_a
- `operator_b` *string* (required) — Input parameter: operator_b
- `family_b` *string* (required) — Input parameter: family_b
- `operator_a` *string* (required) — Input parameter: operator_a
- `size_b` *integer* (required) — Input parameter: size_b

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__microgram__run-compatibility-predictor",
    "arguments": {
      "family_a": "",
      "size_a": 0,
      "operator_b": "",
      "family_b": "",
      "operator_a": "",
      "size_b": 0
    }
  }
}
```

## Related

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