Function countToolCallFunctionTokens

extensions/cli/src/util/tokenizer.ts:67–78

* Count tokens in a single tool call function

(
  toolCallFunction: { name?: string; arguments?: string } | undefined,
)

 * Count tokens in a single tool call function
 */
function countToolCallFunctionTokens(
  toolCallFunction: { name?: string; arguments?: string } | undefined,
): number {
  if (!toolCallFunction) {
    return 0;
  }

  let tokenCount = 0;
  tokenCount += encode(toolCallFunction.name ?? "").length + 10; // Function name and structure overhead
  tokenCount += encode(toolCallFunction.arguments ?? "").length; // Arguments
  return tokenCount;
}

/**
 * Count tokens in tool call outputs