3. MCP Server Reference › 3.3 Engine › Database › engine_db_unlocks

Lifts the locks hanging under one’s own login outside any operation — those left by a pool that fell or by an AI tool that broke off.

The Right

“Direct access → Database → Release table locks” (AGENT_ENGINE_DB_UNLOCKS).

Parameters

Parameter	Type	What it is
[`tables`]	list of strings	which tables to free: the bare name `store` or the real `ms_store`. Without it — all the hanging locks of one’s own login

The tool does not touch what belongs to others:

the storefront’s lock — it stands under MELBIS SYSTEM;
another person’s lock;
the lock of an open program window — it names its operation.

One’s own manual lock from the program looks the same as a hanging one and is lifted together with them. A lock taken a second ago may belong to a call that is still going: the time is visible in engine_db_locks.

The Answer

{"released": {"columns": ["table", "since"],
              "rows": [["store", "2026-09-17 10:12:40"]]}}

Column	What it is
`table`	the freed table without the prefix
`since`	since when it was taken

If there is nothing to lift, rows is empty, and the second block is Nothing of yours is stuck…, or with tables — Nothing of yours is stuck on <tables>….

Refusals

Answer	When
`Unknown table: <name>`	a table that the database does not have is named in `tables`

The common refusals — “Answers and Refusals”.