# get-study-design

`station__clinicaltrials-gov__get-study-design` · external (needs EXECUTION_BACKEND_URL configured) · domain `clinicaltrials-gov` · pv-relevance `pv-adjacent`

Extract study design details — randomization, blinding, masking, allocation, phases, enrollment, and arm count

> **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

- `nct_id` *string* (required) — NCT identifier (e.g., NCT04280705)

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__clinicaltrials-gov__get-study-design",
    "arguments": {
      "nct_id": ""
    }
  }
}
```

## Related

- [/tools](/tools) — all 3062 tools
- [/tools/clinicaltrials-gov__get-study-design](/tools/clinicaltrials-gov__get-study-design) — HTML page
- [/tools/clinicaltrials-gov__get-study-design/json](/tools/clinicaltrials-gov__get-study-design/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide