Introduction: The headers allow multiple policies, so I suggest pluralizing the > summaries like:

[ioggstream]

From https://mailarchive.ietf.org/arch/msg/httpapi/prI-_67g4TdQJOnAP39lkU0mAyY/

introduction

The headers allow multiple policies, so I suggest pluralizing the
summaries like:

• RateLimit-Policy: quota policies, defined by the server, that
  client HTTP requests will consume.

• RateLimit: currently remaining quota available for specific
  policies.