{
  "schema": "https://agent-atoms.com/schemas/atom-v1.json",
  "type": "tool-definition",
  "id": "sql-query",
  "version": "1.0.0",
  "name": "sql-query",
  "description": "Read-only SELECT against a named DSN.",
  "tool_spec": {
    "function_name": "sql_query",
    "summary": "Run a SELECT and return rows.",
    "parameters": {
      "dsn": { "type": "string", "description": "Named DSN identifier", "required": true },
      "sql": { "type": "string", "description": "SELECT statement", "required": true },
      "params": { "type": "array", "description": "Parameterized values", "required": false }
    },
    "returns": { "type": "array", "description": "Result rows as objects." },
    "side_effects": ["network"]
  }
}