Function stripInternalFields

apps/sim/tools/index.ts:618–629

* Strips internal fields (keys starting with `__`) from tool output before * returning to users. The double-underscore prefix is reserved for transient * data (e.g. `__costDollars`) and will never collide with legitimate API * fields like `_id`.

(output: Record<string, unknown>)

 * fields like `_id`.
 */
function stripInternalFields(output: Record<string, unknown>): Record<string, unknown> {
  if (typeof output !== 'object' || output === null || Array.isArray(output)) {
    return output
  }
  const result: Record<string, unknown> = {}
  for (const [key, value] of Object.entries(output)) {
    if (!key.startsWith('__')) {
      result[key] = value
    }
  }
  return result
}

export function postProcessToolOutput(toolId: string, output: Record<string, unknown>) {
  return isCustomTool(toolId) ? output : stripInternalFields(output)