AdsAgent — Google Ads MCP

google_ads_experiment_action_prepare

Prepare native Search experiment schedule/promote with explicit affected campaigns and complete bounded snapshot. Scheduling starts serving; promoting copies trial settings to control. No action is sent during prepare. Compatibility entrypoint; prefer the matching named tool: google_ads_experiment_schedule_prepare, google_ads_experiment_promote_prepare.

Input Schema

Name	Required	Description
`body`	Yes
`customer_id`	Yes	10-digit Google Ads customer id.
`connection_context`	No

Output Schema

Name	Required	Description	Default
`ok`	No
`code`	No
`draft`	No
`error`	No
`items`	No
`needs`	No
`state`	No
`reason`	No
`status`	No
`changes`	No
`receipt`	No
`summary`	No
`platform`	No
`receipts`	No
`retry_at`	No
`retryable`	No
`error_code`	No
`expires_at`	No
`idempotent`	No
`validation`	No
`approved_at`	No
`next_action`	No
`plan_digest`	No
`support_ref`	No
`approval_ref`	No
`confirm_tool`	No
`presentation`	No
`invalid_fields`	No
`rejected_paths`	No
`expected_changes`	No
`origin_support_ref`	No
`instruction_template_id`	No
`google_change_resource_name`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 28, 2026

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"
+}

Changed1 schema field changedOct 13, 2026
- addedInput schema / properties / connection_context
```
Added value: +{
+  "pattern": "^mctx_v1_[0-9a-f]{64}$",
+  "type": "string"
+}
```
AddedOct 4, 2026

TDQS

A4.2/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=false. The description adds important context beyond annotations: prepare sends no action, scheduling starts serving, promoting copies trial settings to control, and a bounded snapshot is produced. It does not discuss permissions or rate limits, but the safety semantics are well covered.

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?

Three sentences, front-loaded with the core purpose, followed by mode behavior and the no-action/preferred-alternative guidance. Every sentence adds value with no redundancy.

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 not be explained, and annotations carry the safety profile. The description still adds useful behavioral context for this prepare operation and its alternatives, though it could say more about required prerequisites or the follow-up confirm step.

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 description coverage is low (33%), so the description must compensate for undocumented body fields. It adds meaning for mode (schedule vs promote) and affected campaigns (explicit, bounded), but does not explain experiment_id format or connection_context semantics, leaving notable gaps.

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

Purpose5/5

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

States a specific verb (prepare) and resource (native Search experiment schedule/promote) with explicit scope (affected campaigns and bounded snapshot). It also distinguishes the two modes and names the preferred sibling tools, so an agent can tell what it does and when it differs from alternatives.

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

Usage Guidelines4/5

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

Explicitly recommends the matching named tools (google_ads_experiment_schedule_prepare, google_ads_experiment_promote_prepare) as preferred alternatives, and clarifies that no action is sent during prepare. It stops short of stating exactly when this compatibility entrypoint should be used instead, but the routing signal is strong.

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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