Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It effectively describes key behaviors: it adds documents to the knowledge base, handles content chunking for documents over 1000 words, and updates both JSON storage and Elasticsearch index. This covers mutation effects, processing logic, and data persistence, though it could mention permissions or error handling.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.