MCP Tools Reference: alloydb

Tool: export_data

Exports data from an AlloyDB cluster to a file in Google Cloud Storage.

Requirements

  • The cluster and primary instance must exist and be in a READY state.
  • The Google Cloud Storage bucket must exist.
  • The AlloyDB service account must have the storage.objectAdmin IAM role to write to the bucket. The AlloyDB service account is in the format of service-{project_number}@gcp-sa-alloydb.iam.gserviceaccount.com. {project_number} is a valid base-10 encoded positive integer.

Usage

  1. Call export_data to export data from a cluster to a Cloud Storage bucket.
  2. This will return a long-running operation that indicates the progress of the export. The time taken for the operation to complete depends on the size of data being exported.
  3. You can poll the status of the operation using the get_operation tool.

The following sample demonstrate how to use curl to invoke the export_data MCP tool.

Curl Request 
                  
curl --location 'https://alloydb.googleapis.com/mcp' \
--header 'content-type: application/json' \
--header 'accept: application/json, text/event-stream' \
--data '{
  "method": "tools/call",
  "params": {
    "name": "export_data",
    "arguments": {
      // provide these details according to the tool's MCP specification
    }
  },
  "jsonrpc": "2.0",
  "id": 1
}'

Input Schema

Export cluster request.

ExportClusterRequest

JSON representation 
{
  "name": string,
  "database": string,

  // Union field destination can be only one of the following:
  "gcsDestination": {
    object (GcsDestination)
  }
  // End of list of possible types for union field destination.

  // Union field export_options can be only one of the following:
  "csvExportOptions": {
    object (CsvExportOptions)
  },
  "sqlExportOptions": {
    object (SqlExportOptions)
  }
  // End of list of possible types for union field export_options.
}
Fields
name

string

Required. The resource name of the cluster.
database

string

Required. Name of the database where the export command will be executed. Note - Value provided should be the same as expected from SELECT current_database(); and NOT as a resource reference.
Union field destination. Oneof field to support other destinations in future. destination can be only one of the following:
gcsDestination

object (GcsDestination)

Required. Option to export data to cloud storage.
Union field export_options. Required field to specify export file type and options. export_options can be only one of the following:
csvExportOptions

object (CsvExportOptions)

Options for exporting data in CSV format. Required field to be set for CSV file type.
sqlExportOptions

object (SqlExportOptions)

Options for exporting data in SQL format. Required field to be set for SQL file type.

GcsDestination

JSON representation 
{
  "uri": string
}
Fields
uri

string

Required. The path to the file in Google Cloud Storage where the export will be stored. The URI is in the form gs://bucketName/fileName.

CsvExportOptions

JSON representation 
{
  "selectQuery": string,
  "fieldDelimiter": string,
  "quoteCharacter": string,
  "escapeCharacter": string
}
Fields
selectQuery

string

Required. The SELECT query used to extract the data.
fieldDelimiter

string

Optional. Specifies the character that separates columns within each row (line) of the file. The default is comma. The value of this argument has to be a character in Hex ASCII Code.
quoteCharacter

string

Optional. Specifies the quoting character to be used when a data value is quoted. The default is double-quote. The value of this argument has to be a character in Hex ASCII Code.
escapeCharacter

string

Optional. Specifies the character that should appear before a data character that needs to be escaped. The default is the same as quote character. The value of this argument has to be a character in Hex ASCII Code.

SqlExportOptions

JSON representation 
{
  "tables": [
    string
  ],

  // Union field _schema_only can be only one of the following:
  "schemaOnly": boolean
  // End of list of possible types for union field _schema_only.

  // Union field _clean_target_objects can be only one of the following:
  "cleanTargetObjects": boolean
  // End of list of possible types for union field _clean_target_objects.

  // Union field _if_exist_target_objects can be only one of the following:
  "ifExistTargetObjects": boolean
  // End of list of possible types for union field _if_exist_target_objects.
}
Fields
tables[]

string

Optional. Tables to export from.

Union field _schema_only.

_schema_only can be only one of the following:
schemaOnly

boolean

Optional. If true, only export the schema.

Union field _clean_target_objects.

_clean_target_objects can be only one of the following:
cleanTargetObjects

boolean

Optional. If true, output commands to DROP all the dumped database objects prior to outputting the commands for creating them.

Union field _if_exist_target_objects.

_if_exist_target_objects can be only one of the following:
ifExistTargetObjects

boolean

Optional. If true, use DROP ... IF EXISTS commands to check for the object's existence before dropping it in clean_target_objects mode.

Output Schema

This resource represents a long-running operation that is the result of a network API call.

Operation

JSON representation 
{
  "name": string,
  "metadata": {
    "@type": string,
    field1: ...,
    ...
  },
  "done": boolean,

  // Union field result can be only one of the following:
  "error": {
    object (Status)
  },
  "response": {
    "@type": string,
    field1: ...,
    ...
  }
  // End of list of possible types for union field result.
}
Fields
name

string

The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the name should be a resource name ending with operations/{unique_id}.
metadata

object

Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.

An object containing fields of an arbitrary type. An additional field "@type" contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" }.
done

boolean

If the value is false, it means the operation is still in progress. If true, the operation is completed, and either error or response is available.
Union field result. The operation result, which can be either an error or a valid response. If done == false, neither error nor response is set. If done == true, exactly one of error or response can be set. Some services might not provide the result. result can be only one of the following:
error

object (Status)

The error result of the operation in case of failure or cancellation.
response

object

The normal, successful response of the operation. If the original method returns no data on success, such as Delete, the response is google.protobuf.Empty. If the original method is standard Get/Create/Update, the response should be the resource. For other methods, the response should have the type XxxResponse, where Xxx is the original method name. For example, if the original method name is TakeSnapshot(), the inferred response type is TakeSnapshotResponse.

An object containing fields of an arbitrary type. An additional field "@type" contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" }.

Any

JSON representation 
{
  "typeUrl": string,
  "value": string
}
Fields
typeUrl

string

Identifies the type of the serialized Protobuf message with a URI reference consisting of a prefix ending in a slash and the fully-qualified type name.

Example: type.googleapis.com/google.protobuf.StringValue

This string must contain at least one / character, and the content after the last / must be the fully-qualified name of the type in canonical form, without a leading dot. Do not write a scheme on these URI references so that clients do not attempt to contact them.

The prefix is arbitrary and Protobuf implementations are expected to simply strip off everything up to and including the last / to identify the type. type.googleapis.com/ is a common default prefix that some legacy implementations require. This prefix does not indicate the origin of the type, and URIs containing it are not expected to respond to any requests.

All type URL strings must be legal URI references with the additional restriction (for the text format) that the content of the reference must consist only of alphanumeric characters, percent-encoded escapes, and characters in the following set (not including the outer backticks): /-.~_!$&()*+,;=. Despite our allowing percent encodings, implementations should not unescape them to prevent confusion with existing parsers. For example, type.googleapis.com%2FFoo should be rejected.

In the original design of Any, the possibility of launching a type resolution service at these type URLs was considered but Protobuf never implemented one and considers contacting these URLs to be problematic and a potential security issue. Do not attempt to contact type URLs.
value

string (bytes format)

Holds a Protobuf serialization of the type described by type_url.

A base64-encoded string.

Status

JSON representation 
{
  "code": integer,
  "message": string,
  "details": [
    {
      "@type": string,
      field1: ...,
      ...
    }
  ]
}
Fields
code

integer

The status code, which should be an enum value of google.rpc.Code.
message

string

A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
details[]

object

A list of messages that carry the error details. There is a common set of message types for APIs to use.

An object containing fields of an arbitrary type. An additional field "@type" contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" }.

Tool Annotations

Destructive Hint: ❌ | Idempotent Hint: ✅ | Read Only Hint: ❌ | Open World Hint: ❌