# evolve

`station__dna__evolve` · external (needs EXECUTION_BACKEND_URL configured) · domain `dna` · pv-relevance `non-pv`

Run genetic algorithm evolution from seed DNA sequences toward a target word. Simulates natural selection with mutation, crossover, and fitness scoring over multiple generations.

> **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

- `seeds` *array* (required) — Initial DNA seed sequences (strings)
- `target` *string* (required) — Target word to evolve toward
- `generations` *integer* — Number of generations (default: 100)
- `population_size` *integer* — Population size per generation (default: 50)
- `mutation_rate` *number* — Mutation rate 0.0-1.0 (default: 0.01)

## Example call

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__dna__evolve",
    "arguments": {
      "seeds": [],
      "target": ""
    }
  }
}
```

## Related

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