feat: add spanner-execute-sql tool - #576

This tool can be used across spanner sources.

`spanner-execute-sql` config is as below:

```
tools:
  spanner_execute_sql_tool:
    kind: "spanner-execute-sql"
    source: my-spanner-source
    description: Use this tool to execute sql.
```

The `spanner-execute-sql` tool takes one parameter. Example request as
follow:
```
curl -X POST -H "Content-Type: application/json" -d '{"sql": "SELECT 1"}' http://127.0.0.1:5000/api/tool/spanner_execute_sql_tool/invoke
```

---------

Co-authored-by: Yuan <45984206+Yuan325@users.noreply.github.com> d65747a

🤖 I have created a release *beep* *boop*
---


##
[0.6.0](v0.5.0...v0.6.0)
(2025-05-28)


### Features

* Add Execute sql tool for SQL Server(MSSQL)
([#585](#585))
([6083a22](6083a22))
* Add mysql-execute-sql tool
([#577](#577))
([8590061](8590061))
* Add new BigQuery tools: execute_sql, list_datatset_ids,
list_table_ids, get_dataset_info, get_table_info
([0fd88b5](0fd88b5))
* Add spanner-execute-sql tool
([#576](#576))
([d65747a](d65747a))
* Add support for read-only in Spanner tool
([#563](#563))
([6512704](6512704))
* Adding support for the --prebuilt flag
([#604](#604))
([a29c800](a29c800))
* Support MCP stdio transport protocol
([#607](#607))
([1702ce1](1702ce1))


### Bug Fixes

* Explicitly set query location for BigQuery queries
([#586](#586))
([eb52b66](eb52b66))
* Fix spellings in comments
([#561](#561))
([b58bf76](b58bf76))
* Prevent tool calls through MCP when auth is required
([#544](#544))
([e747b6e](e747b6e))
* Reinitialize required slice if nil
([#571](#571))
([04dcf47](04dcf47)),
closes [#564](#564)

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

🤖 I have created a release *beep* *boop*
---

##
[0.6.0](v0.5.0...v0.6.0)
(2025-05-28)

### Features

* Add Execute sql tool for SQL Server(MSSQL)
([#585](#585))
([6083a22](6083a22))
* Add mysql-execute-sql tool
([#577](#577))
([8590061](8590061))
* Add new BigQuery tools: execute_sql, list_datatset_ids,
list_table_ids, get_dataset_info, get_table_info
([0fd88b5](0fd88b5))
* Add spanner-execute-sql tool
([#576](#576))
([d65747a](d65747a))
* Add support for read-only in Spanner tool
([#563](#563))
([6512704](6512704))
* Adding support for the --prebuilt flag
([#604](#604))
([a29c800](a29c800))
* Support MCP stdio transport protocol
([#607](#607))
([1702ce1](1702ce1))

### Bug Fixes

* Explicitly set query location for BigQuery queries
([#586](#586))
([eb52b66](eb52b66))
* Fix spellings in comments
([#561](#561))
([b58bf76](b58bf76))
* Prevent tool calls through MCP when auth is required
([#544](#544))
([e747b6e](e747b6e))
* Reinitialize required slice if nil
([#571](#571))
([04dcf47](04dcf47)),
closes [#564](#564)

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com> 3180830

🤖 I have created a release *beep* *boop*
---

##
[0.6.0](googleapis/mcp-toolbox@v0.5.0...v0.6.0)
(2025-05-28)

### Features

* Add Execute sql tool for SQL Server(MSSQL)
([googleapis#585](googleapis#585))
([6083a22](googleapis@6083a22))
* Add mysql-execute-sql tool
([googleapis#577](googleapis#577))
([8590061](googleapis@8590061))
* Add new BigQuery tools: execute_sql, list_datatset_ids,
list_table_ids, get_dataset_info, get_table_info
([0fd88b5](googleapis@0fd88b5))
* Add spanner-execute-sql tool
([googleapis#576](googleapis#576))
([d65747a](googleapis@d65747a))
* Add support for read-only in Spanner tool
([googleapis#563](googleapis#563))
([6512704](googleapis@6512704))
* Adding support for the --prebuilt flag
([googleapis#604](googleapis#604))
([a29c800](googleapis@a29c800))
* Support MCP stdio transport protocol
([googleapis#607](googleapis#607))
([1702ce1](googleapis@1702ce1))

### Bug Fixes

* Explicitly set query location for BigQuery queries
([googleapis#586](googleapis#586))
([eb52b66](googleapis@eb52b66))
* Fix spellings in comments
([googleapis#561](googleapis#561))
([b58bf76](googleapis@b58bf76))
* Prevent tool calls through MCP when auth is required
([googleapis#544](googleapis#544))
([e747b6e](googleapis@e747b6e))
* Reinitialize required slice if nil
([googleapis#571](googleapis#571))
([04dcf47](googleapis@04dcf47)),
closes [googleapis#564](googleapis#564)

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com> 3180830

🤖 I have created a release *beep* *boop*
---


##
[0.6.0](googleapis/mcp-toolbox@v0.5.0...v0.6.0)
(2025-05-28)


### Features

* Add Execute sql tool for SQL Server(MSSQL)
([#585](googleapis/mcp-toolbox#585))
([6083a22](googleapis/mcp-toolbox@6083a22))
* Add mysql-execute-sql tool
([#577](googleapis/mcp-toolbox#577))
([8590061](googleapis/mcp-toolbox@8590061))
* Add new BigQuery tools: execute_sql, list_datatset_ids,
list_table_ids, get_dataset_info, get_table_info
([0fd88b5](googleapis/mcp-toolbox@0fd88b5))
* Add spanner-execute-sql tool
([#576](googleapis/mcp-toolbox#576))
([d65747a](googleapis/mcp-toolbox@d65747a))
* Add support for read-only in Spanner tool
([#563](googleapis/mcp-toolbox#563))
([6512704](googleapis/mcp-toolbox@6512704))
* Adding support for the --prebuilt flag
([#604](googleapis/mcp-toolbox#604))
([a29c800](googleapis/mcp-toolbox@a29c800))
* Support MCP stdio transport protocol
([#607](googleapis/mcp-toolbox#607))
([1702ce1](googleapis/mcp-toolbox@1702ce1))


### Bug Fixes

* Explicitly set query location for BigQuery queries
([#586](googleapis/mcp-toolbox#586))
([eb52b66](googleapis/mcp-toolbox@eb52b66))
* Fix spellings in comments
([#561](googleapis/mcp-toolbox#561))
([b58bf76](googleapis/mcp-toolbox@b58bf76))
* Prevent tool calls through MCP when auth is required
([#544](googleapis/mcp-toolbox#544))
([e747b6e](googleapis/mcp-toolbox@e747b6e))
* Reinitialize required slice if nil
([#571](googleapis/mcp-toolbox#571))
([04dcf47](googleapis/mcp-toolbox@04dcf47)),
closes [#564](googleapis/mcp-toolbox#564)

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>