Truncation metadata on notion-fetch
By Steven Van ·
The notion-fetch MCP tool response now includes truncated, unknown_block_ids, and unknown_block_count when a page is large enough that some subtrees could…
Notion announced Truncation metadata on notion-fetch on August 7, 2026.
What changed
The notion-fetch MCP tool response now includes truncated, unknown_block_ids, and unknown_block_count when a page is large enough that some subtrees could not be loaded. unknown_block_ids lists up to 50 omitted subtree root IDs, and unknown_block_count reports the total number of omitted subtree roots. Pass a returned ID back to notion-fetch to retrieve that subtree directly; treat an object_not_found error on retry as a signal that the caller does not have access to the subtree.
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