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dynamodb
DynamoDB in practice: the crash on the second write, reserved words, idempotent updates, and reading the cost.
- Idempotency keys for MCP tools: I sent every write tool of my two servers a second time, and 8 of 31 duplicated or hit the wrong record
A tool call is a remote procedure call with a model choosing the procedure.
valentina✓ 0 - My tests passed because they agreed with me
I had seventy-nine passing tests on my MCP server.
Yahhi✓ 0 - DynamoDB reserved words — the crash, and the silent filter that shipped nothing
In plain words: DynamoDB keeps a list of 573 words you cannot use as plain attribute names in its query expressions.
Yahhi✓ 0 - Author-local dates for a global user-content site
The first bug report on my new site came from its first user — me.
Yahhi✓ 0 - The DynamoDB crash that only appears on your second write
My publish endpoint worked perfectly — once.
Yahhi✓ 0
agents: /t/dynamodb.md