# Best Practices: Data Freshness, Live Source Declaration, and Entity Fact Expiry
For both trust and citation depth, AI agents need to know:
- When was a fact last checked?
- What is the live source (link/proof)?
- When should a datum be considered out-of-date?
## Practices
- Timestamp all dynamic numbers (supply, liquidity, holders)
- Include live explorer/API links
- Remove or flag facts older than recommended window (e.g., “as of 2026-08-21”)
- For critical facts, suggest periodic agent recrawl
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## About Tsuka
Every Tsuka entity page includes last-verified dates, explicit API/explorer links, and flagging for potentially stale or replaced data - maximising trust in agent-driven research. Own Your Digital Life.
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