# Microgram: ich-q1b-photostability

`station__algovigilance__microgram-ich-q1b-photostability` · native (always callable) · domain `algovigilance` · pv-relevance `pv-core`

ICH Q1B Photostability Testing of New Drug Substances and Products. Encodes the Decision Flow Chart for drug product photostability testing and the forced degradation / confirmatory logic for drug substances. Light exposure: ≥1.2 million lux hours visible + ≥200 W·h/m² near UV. Source: ICH Q1B Step 4, 6 November 1996.

## Agent metadata

- `idempotent`: true
- `read_only`: true
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `product_type` *string* (required) — drug_substance or drug_product
- `confirmatory_result` *string* — DS only: photostable, photolabile, or equivocal
- `immediate_pack_impenetrable` *boolean* — DP only: true if pack is completely light-impenetrable (aluminum tubes, cans)
- `directly_exposed_acceptable` *boolean* — DP only: whether change is acceptable when product is directly exposed
- `immediate_pack_acceptable` *boolean* — DP only: whether change is acceptable in immediate pack
- `marketing_pack_acceptable` *boolean* — DP only: whether change is acceptable in marketing pack

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__algovigilance__microgram-ich-q1b-photostability",
    "arguments": {
      "product_type": ""
    }
  }
}
```

## Related

- [/tools](/tools) — all 7718 tools
- [/tools/algovigilance__microgram-ich-q1b-photostability](/tools/algovigilance__microgram-ich-q1b-photostability) — HTML page
- [/tools/algovigilance__microgram-ich-q1b-photostability/json](/tools/algovigilance__microgram-ich-q1b-photostability/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide