Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the baseline is 3, but the description adds real meaning: connectionId is sourced from fillo_list_connections, guildId denotes a Discord server specifically, and the word 'instead' signals the two parameters are mutually exclusive alternatives. The mutual-exclusivity relationship is not encoded in the schema, so this is a genuine contribution.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.