Reference · Glossary
Metadata filter (vector search)
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Restrict similarity search to chunks matching **tags** — tenant, date, doc type — before ranking vectors.
When to use
Multi-tenant RAG, “search only HR policies,” versioned doc sets.
When not to
When metadata is wrong or missing — filters hide the right chunks silently.
Example
`filter: { department: "legal" }` then embed similarity on the subset.