# trajectory

`station__td-screen__trajectory` · external (needs EXECUTION_BACKEND_URL configured) · domain `td-screen` · pv-relevance `non-pv`

Project tardive dyskinesia risk trajectory over time for a patient profile. Shows how irreversibility score, recovery capacity, and supersensitivity evolve month by month, and when the critical boundary is crossed.

> **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

- `drug_class` *string* (required) — Drug class: typical_high_potency, typical_low_potency, atypical, dopaminergic, antiemetic, other
- `age` *number* (required) — Patient age in years
- `dose_ratio` *number* — Dose relative to standard (1.0 = standard)
- `prior_episodes` *number* — Number of prior dyskinesia episodes
- `max_months` *number* — Maximum projection window in months (default 60)

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__td-screen__trajectory",
    "arguments": {
      "drug_class": "",
      "age": 0
    }
  }
}
```

## Related

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