Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb ('Get'), names the exact resource ('status and result availability of a TTS job'), and enumerates the states checked (waiting, processing, completed, cancelled, failed) plus asset readiness (MP3/ASS). This clearly distinguishes it from creation, cancellation, and actual result-fetching siblings, even without naming them explicitly.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.