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AdsAgent — Google Ads MCP

google_ads_extension_asset_create_prepare

Prepare one typed unlinked sitelink, callout, English structured snippet, call, price or promotion asset. Full provider validation; no implicit linking or upload. Requires extension flag and migration.

Input Schema

NameRequiredDescriptionDefault
bodyYes
customer_idYes10-digit Google Ads customer id.
connection_contextNo

Output Schema

NameRequiredDescriptionDefault
okNo
codeNo
draftNo
errorNo
itemsNo
needsNo
stateNo
reasonNo
statusNo
changesNo
receiptNo
summaryNo
platformNo
receiptsNo
retry_atNo
retryableNo
error_codeNo
expires_atNo
idempotentNo
validationNo
approved_atNo
next_actionNo
plan_digestNo
support_refNo
approval_refNo
confirm_toolNo
presentationNo
invalid_fieldsNo
rejected_pathsNo
expected_changesNo
origin_support_refNo
instruction_template_idNo
google_change_resource_nameNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "additionalProperties": true,
      +  "properties": {
      +    "approval_ref": {
      +      "type": "string"
      +    },
      +    "approved_at": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "changes": {
      +      "items": {
      +        "additionalProperties": true,
      +        "properties": {},
      +        "type": "object"
      +      },
      +      "type": "array"
      +    },
      +    "code": {
      +      "type": "string"
      +    },
      +    "confirm_tool": {
      +      "type": "string"
      +    },
      +    "draft": {
      +      "anyOf": [
      +        {
      +          "additionalProperties": true,
      +          "properties": {
      +            "action_type": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "asset_kind": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "byte_size": {
      +              "anyOf": [
      +                {
      +                  "type": "integer"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "content_type": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "created_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "entity_id": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "entity_level": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "expires_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "filename": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "id": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "sha256": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "status": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            }
      +          },
      +          "type": "object"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "error": {
      +      "anyOf": [
      +        {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "additionalProperties": true,
      +              "properties": {
      +                "code": {
      +                  "type": "string"
      +                },
      +                "details": {
      +                  "additionalProperties": true,
      +                  "properties": {},
      +                  "type": "object"
      +                },
      +                "message": {
      +                  "type": "string"
      +                },
      +                "retryable": {
      +                  "type": "boolean"
      +                },
      +                "support_ref": {
      +                  "type": "string"
      +                }
      +              },
      +              "type": "object"
      +            }
      +          ]
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "error_code": {
      +      "type": "string"
      +    },
      +    "expected_changes": {
      +      "items": {
      +        "additionalProperties": true,
      +        "properties": {},
      +        "type": "object"
      +      },
      +      "type": "array"
      +    },
      +    "expires_at": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "google_change_resource_name": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "idempotent": {
      +      "type": "boolean"
      +    },
      +    "instruction_template_id": {
      +      "type": "string"
      +    },
      +    "invalid_fields": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    },
      +    "items": {
      +      "items": {
      +        "additionalProperties": true,
      +        "properties": {
      +          "index": {
      +            "type": "integer"
      +          },
      +          "operation": {
      +            "type": "string"
      +          },
      +          "receipt": {
      +            "additionalProperties": true,
      +            "properties": {},
      +            "type": "object"
      +          },
      +          "state": {
      +            "type": "string"
      +          },
      +          "summary": {
      +            "additionalProperties": true,
      +            "properties": {},
      +            "type": "object"
      +          }
      +        },
      +        "type": "object"
      +      },
      +      "type": "array"
      +    },
      +    "needs": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    },
      +    "next_action": {
      +      "anyOf": [
      +        {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "additionalProperties": true,
      +              "properties": {},
      +              "type": "object"
      +            }
      +          ]
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "ok": {
      +      "type": "boolean"
      +    },
      +    "origin_support_ref": {
      +      "type": "string"
      +    },
      +    "plan_digest": {
      +      "type": "string"
      +    },
      +    "platform": {
      +      "type": "string"
      +    },
      +    "presentation": {
      +      "type": "string"
      +    },
      +    "reason": {
      +      "type": "string"
      +    },
      +    "receipt": {
      +      "anyOf": [
      +        {
      +          "additionalProperties": true,
      +          "properties": {
      +            "acknowledged_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "action_type": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "claimed_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "draft_id": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "entity_id": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "entity_level": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "expires_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "finished_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "operation_ref": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "operation_state": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "operator_review_required": {
      +              "type": "boolean"
      +            },
      +            "outcome_category": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "resource_name": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "sent_at": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "status": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "null"
      +                }
      +              ]
      +            },
      +            "summary": {
      +              "additionalProperties": true,
      +              "properties": {},
      +              "type": "object"
      +            }
      +          },
      +          "type": "object"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "receipts": {
      +      "items": {
      +        "additionalProperties": true,
      +        "properties": {},
      +        "type": "object"
      +      },
      +      "type": "array"
      +    },
      +    "rejected_paths": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    },
      +    "retry_at": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "retryable": {
      +      "type": "boolean"
      +    },
      +    "state": {
      +      "type": "string"
      +    },
      +    "status": {
      +      "anyOf": [
      +        {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "type": "integer"
      +            }
      +          ]
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ]
      +    },
      +    "summary": {
      +      "additionalProperties": true,
      +      "properties": {},
      +      "type": "object"
      +    },
      +    "support_ref": {
      +      "type": "string"
      +    },
      +    "validation": {
      +      "additionalProperties": true,
      +      "properties": {},
      +      "type": "object"
      +    }
      +  },
      +  "type": "object"
      +}
  2. Changed1 schema field changed
    • addedInput schema / properties / connection_context
      Added value: +{
      +  "pattern": "^mctx_v1_[0-9a-f]{64}$",
      +  "type": "string"
      +}
  3. Added

TDQS

A3.8/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already state it is not read-only, not destructive, and closed-world. The description adds real value beyond that: full provider validation is performed, and no linking or upload happens implicitly, which scopes what the call actually changes. Prerequisites (extension flag, migration) are flagged but not elaborated.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, zero filler, with the operation and its scope constraints front-loaded before the prerequisites. Everything stated earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists so return values need no explanation, and the description covers scope, validation behavior, and high-level prerequisites. The missing piece is the explicit handoff to the confirm tool, which an agent needs to complete the workflow.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is only 33% — just customer_id is documented — but the schema itself is highly structured with const discriminators, enums (snippet headers, price_type) and min/max constraints. The description's enumeration of the six asset kinds matches the oneOf branches and helps the agent pick a branch, but it explains nothing about name, connection_context, or offering/price constraints.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (Prepare) and resource (one typed asset of six kinds), and the qualifiers 'unlinked' and 'no implicit linking or upload' implicitly separate it from asset_upload_prepare and asset_link_prepare. It does not explicitly name the confirm counterpart, so sibling differentiation is inferred rather than stated.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The 'Prepare' verb and 'no implicit linking or upload' imply this is a pre-mutation validation step that must precede google_ads_extension_asset_create_confirm, but the description never says so or names the confirm tool. The 'Requires extension flag and migration' clause hints at preconditions without explaining them.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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