Changes to Count message tokens (Anthropic Messages API)

added the new optional request property tools/items/defer_loading

added the new optional request property output_config

added the new optional request property output_format

added the new optional request property tools/items/strict

added the new optional request property messages/items/content/oneOf[subschema #2]/items/data

added the new optional request property messages/items/content/oneOf[subschema #2]/items/signature

added the new optional request property system/oneOf[subschema #2]/items/data

added the new optional request property system/oneOf[subschema #2]/items/signature

added the new optional request property messages/items/content/oneOf[subschema #2]/items/extra_content

added the new optional request property system/oneOf[subschema #2]/items/extra_content

added the optional property error/provider to the response with the 400 status

added the optional property error/provider to the response with the 401 status

added the new optional request property cache_control

added the new optional request property tools/items/cache_control

endpoint added