# run-signature-collider

`station__microgram__run-signature-collider` · external (needs EXECUTION_BACKEND_URL configured) · domain `microgram` · pv-relevance `pv-core`

Primitive Collider: takes two microgram primitive signatures and predicts the resultant signature when chained. Tests whether primitive algebra is predictive — does compose(A,B) predict chain(A,B)? First experimental instrument for T1 primitive science.

> **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

- `dominant_a` *string* (required) — Input parameter: dominant_a
- `expression_b` *string* (required) — Input parameter: expression_b
- `dominant_b` *string* (required) — Input parameter: dominant_b
- `arguments_a` *string* (required) — Input parameter: arguments_a
- `arguments_b` *string* (required) — Input parameter: arguments_b
- `expression_a` *string* (required) — Input parameter: expression_a

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__microgram__run-signature-collider",
    "arguments": {
      "dominant_a": "",
      "expression_b": "",
      "dominant_b": "",
      "arguments_a": "",
      "arguments_b": "",
      "expression_a": ""
    }
  }
}
```

## Related

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