To verify the integrity of a local bucket. The command ./splunk check-integrity -bucketPath [bucket path] [-verbose] is used to verify the integrity of a local bucket by comparing the hashes stored in the l1Hashes and l2Hash files with the actual data in the bucket1. This command can help detect any tampering or corruption of the data.

The eval command is a distributable streaming command, which means that it can run on the search peers in a distributed environment1. The search peers are the indexers that store the data and perform the initial steps of the search processing2. The eval command calculates an expression and puts the resulting value into a search results field1. In your search, you are using the eval command to create a new field called "responsible_team" based on the values in the "account" field.

https://docs.splunk.com/Documentation/Splunk/8.2.1/Updating/Filterclients Reference:
same/td-p/390910