This change sets an explicit project id in the BigQuery client from the conversation context. Without this the client was trying to set a project from the environment's application default credentials and running into issues where application default credentials is not available.
PiperOrigin-RevId: 772695883
This change introduces unit tests in which the behavior of the tool is asserted for various query types in various write modes through a mocked BigQuery client.
PiperOrigin-RevId: 770653117
This allows to protect against any write operations (e.g. update or delete a table), useful for some agents that must only be used in a read-only mode, while the user may have write permissions.
PiperOrigin-RevId: 769803741
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