MCP Tools Reference: apihub.googleapis.com

Tool: list_attributes

List all attributes.

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

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

Where, REGION is the supported API hub region. For more information, see Supported regions.

Input Schema

The ListAttributes method's request.

ListAttributesRequest

JSON representation 
{
  "parent": string,
  "filter": string,
  "pageSize": integer,
  "pageToken": string
}
Fields
parent

string

Required. The parent resource for Attribute. Format: projects/{project}/locations/{location}
filter

string

Optional. An expression that filters the list of Attributes.

A filter expression consists of a field name, a comparison operator, and a value for filtering. The value must be a string or a boolean. The comparison operator must be one of: <, > or =. Filters are not case sensitive.

The following fields in the Attribute are eligible for filtering:

  • display_name - The display name of the Attribute. Allowed comparison operators: =.
  • definition_type - The definition type of the attribute. Allowed comparison operators: =.
  • scope - The scope of the attribute. Allowed comparison operators: =.
  • data_type - The type of the data of the attribute. Allowed comparison operators: =.
  • mandatory - Denotes whether the attribute is mandatory or not. Allowed comparison operators: =.
  • create_time - The time at which the Attribute was created. The value should be in the (RFC3339)[https://tools.ietf.org/html/rfc3339] format. Allowed comparison operators: > and <.

Expressions are combined with either AND logic operator or OR logical operator but not both of them together i.e. only one of the AND or OR operator can be used throughout the filter string and both the operators cannot be used together. No other logical operators are supported. At most three filter fields are allowed in the filter string and if provided more than that then INVALID_ARGUMENT error is returned by the API.

Here are a few examples:

  • display_name = production - - The display name of the attribute is production.
  • (display_name = production) AND (create_time < \"2021-08-15T14:50:00Z\") AND (create_time > \"2021-08-10T12:00:00Z\") - The display name of the attribute is production and the attribute was created before 2021-08-15 14:50:00 UTC and after 2021-08-10 12:00:00 UTC.
  • display_name = production OR scope = api - The attribute where the display name is production or the scope is api.
pageSize

integer

Optional. The maximum number of attribute resources to return. The service may return fewer than this value. If unspecified, at most 50 attributes will be returned. The maximum value is 1000; values above 1000 will be coerced to 1000.
pageToken

string

Optional. A page token, received from a previous ListAttributes call. Provide this to retrieve the subsequent page.

When paginating, all other parameters provided to ListAttributes must match the call that provided the page token.

Output Schema

The ListAttributes method's response.

ListAttributesResponse

JSON representation 
{
  "attributes": [
    {
      object (Attribute)
    }
  ],
  "nextPageToken": string
}
Fields
attributes[]

object (Attribute)

The list of all attributes.
nextPageToken

string

A token, which can be sent as page_token to retrieve the next page. If this field is omitted, there are no subsequent pages.

Attribute

JSON representation 
{
  "name": string,
  "displayName": string,
  "description": string,
  "definitionType": enum (DefinitionType),
  "scope": enum (Scope),
  "dataType": enum (DataType),
  "allowedValues": [
    {
      object (AllowedValue)
    }
  ],
  "cardinality": integer,
  "mandatory": boolean,
  "createTime": string,
  "updateTime": string
}
Fields
name

string

Identifier. The name of the attribute in the API Hub.

Format: projects/{project}/locations/{location}/attributes/{attribute}
displayName

string

Required. The display name of the attribute.
description

string

Optional. The description of the attribute.
definitionType

enum (DefinitionType)

Output only. The definition type of the attribute.
scope

enum (Scope)

Required. The scope of the attribute. It represents the resource in the API Hub to which the attribute can be linked.
dataType

enum (DataType)

Required. The type of the data of the attribute.
allowedValues[]

object (AllowedValue)

Optional. The list of allowed values when the attribute value is of type enum. This is required when the data_type of the attribute is ENUM. The maximum number of allowed values of an attribute will be 1000.
cardinality

integer

Optional. The maximum number of values that the attribute can have when associated with an API Hub resource. Cardinality 1 would represent a single-valued attribute. It must not be less than 1 or greater than 20. If not specified, the cardinality would be set to 1 by default and represent a single-valued attribute.
mandatory

boolean

Output only. When mandatory is true, the attribute is mandatory for the resource specified in the scope. Only System defined attributes can be mandatory.
createTime

string (Timestamp format)

Output only. The time at which the attribute was created.

Uses RFC 3339, where generated output will always be Z-normalized and use 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples: "2014-10-02T15:01:23Z", "2014-10-02T15:01:23.045123456Z" or "2014-10-02T15:01:23+05:30".
updateTime

string (Timestamp format)

Output only. The time at which the attribute was last updated.

Uses RFC 3339, where generated output will always be Z-normalized and use 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples: "2014-10-02T15:01:23Z", "2014-10-02T15:01:23.045123456Z" or "2014-10-02T15:01:23+05:30".

AllowedValue

JSON representation 
{
  "id": string,
  "displayName": string,
  "description": string,
  "immutable": boolean
}
Fields
id

string

Required. The ID of the allowed value. * If provided, the same will be used. The service will throw an error if the specified id is already used by another allowed value in the same attribute resource. * If not provided, a system generated id derived from the display name will be used. In this case, the service will handle conflict resolution by adding a system generated suffix in case of duplicates.

This value should be 4-63 characters, and valid characters are /[a-z][0-9]-/.
displayName

string

Required. The display name of the allowed value.
description

string

Optional. The detailed description of the allowed value.
immutable

boolean

Optional. When set to true, the allowed value cannot be updated or deleted by the user. It can only be true for System defined attributes.

Timestamp

JSON representation 
{
  "seconds": string,
  "nanos": integer
}
Fields
seconds

string (int64 format)

Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z. Must be between -62135596800 and 253402300799 inclusive (which corresponds to 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z).
nanos

integer

Non-negative fractions of a second at nanosecond resolution. This field is the nanosecond portion of the duration, not an alternative to seconds. Negative second values with fractions must still have non-negative nanos values that count forward in time. Must be between 0 and 999,999,999 inclusive.

Tool Annotations

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