Complex sentence: The first cookie LSID has no Domain attribute, and a Path attribute set to/accounts, which tells the browser to use the cookie only when requesting pages contained in docs.foo.com/accounts (the domain is derived from the request domain).
Split into simpler sentences: The first cookie, LSID, has no Domain attribute, and has a Path attribute set to/accounts. This tells the browser to use the cookie only when requesting pages contained in docs.foo.com/accounts (the domain is derived from the request domain).