BlitzReels Video Editor

Carousel Slides undo

carousels_slides_undo

DestructiveIdempotent

Restore the previous carousel document revision, replacing the current slide document.

Input Schema

Name	Required	Description
`projectId`	Yes	UUID string.
`workspaceId`	No
`idempotencyKey`	Yes

Output Schema

Name	Required	Description	Default
`kit`	No
`name`	Yes
`txid`	Yes
`frame`	Yes
`style`	Yes
`locale`	Yes
`slides`	Yes
`can_undo`	Yes
`platform`	Yes
`revision`	Yes
`warnings`	Yes
`templates`	Yes
`font_faces`	No
`project_id`	Yes
`next_actions`	Yes
`mutationReceipt`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed14 schema fields changedOct 18, 2026

addedOutput schema / $schema

Added value: +"https://json-schema.org/draft/2020-12/schema"

addedOutput schema / properties / font_faces

Added value: +{
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "family": {
+        "maxLength": 160,
+        "minLength": 1,
+        "type": "string"
+      },
+      "src": {
+        "maxLength": 4000,
+        "minLength": 1,
+        "type": "string"
+      },
+      "style": {
+        "enum": [
+          "normal",
+          "italic",
+          "oblique"
+        ],
+        "type": "string"
+      },
+      "unicodeRange": {
+        "maxLength": 8000,
+        "type": "string"
+      },
+      "weight": {
+        "maxLength": 32,
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "family",
+      "src",
+      "weight",
+      "style",
+      "unicodeRange"
+    ],
+    "type": "object"
+  },
+  "maxItems": 256,
+  "type": "array"
+}

addedOutput schema / properties / mutationReceipt / properties / id / format
```
Added value: +"uuid"
```

addedOutput schema / properties / mutationReceipt / properties / id / pattern

Added value: +"^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"

changedOutput schema / properties / mutationReceipt / properties / id / type
```
Previous value: -[
-  "string",
-  "null"
-]New value: +"string"
```
changedOutput schema / properties / mutationReceipt / properties / key / type
```
Previous value: -[
-  "string",
-  "null"
-]New value: +"string"
```
addedOutput schema / properties / mutationReceipt / properties / status / const
```
Added value: +"completed"
```
removedOutput schema / properties / mutationReceipt / properties / status / enum
```
Removed value: -[
-  "completed"
-]
```

addedOutput schema / properties / slides / items / properties / visual / properties / creative_artifact_id

Added value: +{
+  "format": "uuid",
+  "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+  "type": "string"
+}

addedOutput schema / properties / slides / items / properties / visual / properties / creative_source

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "artifact_id": {
+      "format": "uuid",
+      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+      "type": "string"
+    },
+    "composition_id": {
+      "minLength": 1,
+      "type": "string"
+    },
+    "controls": {
+      "anyOf": [
+        {
+          "additionalProperties": false,
+          "properties": {
+            "fields": {
+              "items": {
+                "oneOf": [
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "key": {
+                        "maxLength": 80,
+                        "minLength": 1,
+                        "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+                        "type": "string"
+                      },
+                      "label": {
+                        "maxLength": 120,
+                        "minLength": 1,
+                        "type": "string"
+                      },
+                      "maxLength": {
+                        "maximum": 10000,
+                        "minimum": 1,
+                        "type": "integer"
+                      },
+                      "type": {
+                        "const": "text",
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "key",
+                      "label",
+                      "type",
+                      "maxLength"
+                    ],
+                    "type": "object"
+                  },
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "key": {
+                        "maxLength": 80,
+                        "minLength": 1,
+                        "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+                        "type": "string"
+                      },
+                      "label": {
+                        "maxLength": 120,
+                        "minLength": 1,
+                        "type": "string"
+                      },
+                      "type": {
+                        "const": "color",
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "key",
+                      "label",
+                      "type"
+                    ],
+                    "type": "object"
+                  },
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "key": {
+                        "maxLength": 80,
+                        "minLength": 1,
+                        "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+                        "type": "string"
+                      },
+                      "label": {
+                        "maxLength": 120,
+                        "minLength": 1,
+                        "type": "string"
+                      },
+                      "type": {
+                        "const": "media",
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "key",
+                      "label",
+                      "type"
+                    ],
+                    "type": "object"
+                  },
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "key": {
+                        "maxLength": 80,
+                        "minLength": 1,
+                        "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+                        "type": "string"
+                      },
+                      "label": {
+                        "maxLength": 120,
+                        "minLength": 1,
+                        "type": "string"
+                      },
+                      "max": {
+                        "maximum": 10800,
+                        "type": "number"
+                      },
+                      "min": {
+                        "minimum": 0,
+                        "type": "number"
+                      },
+                      "step": {
+                        "exclusiveMinimum": 0,
+                        "type": "number"
+                      },
+                      "type": {
+                        "const": "timing",
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "key",
+                      "label",
+                      "type",
+                      "min",
+                      "max",
+                      "step"
+                    ],
+                    "type": "object"
+                  }
+                ]
+              },
+              "maxItems": 40,
+              "minItems": 1,
+              "type": "array"
+            },
+            "file": {
+              "format": "ends_with",
+              "maxLength": 180,
+              "minLength": 1,
+              "pattern": ".*\\.json$",
+              "type": "string"
+            }
+          },
+          "required": [
+            "file",
+            "fields"
+          ],
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "fps": {
+      "exclusiveMinimum": 0,
+      "type": "number"
+    },
+    "frame": {
+      "maximum": 9007199254740991,
+      "minimum": 0,
+      "type": "integer"
+    },
+    "frame_hash": {
+      "pattern": "^[a-f0-9]{64}$",
+      "type": "string"
+    },
+    "height": {
+      "exclusiveMinimum": 0,
+      "maximum": 9007199254740991,
+      "type": "integer"
+    },
+    "media_asset_id": {
+      "format": "uuid",
+      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+      "type": "string"
+    },
+    "project_id": {
+      "format": "uuid",
+      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+      "type": "string"
+    },
+    "runtime_identity": {
+      "minLength": 1,
+      "type": "string"
+    },
+    "source_hash": {
+      "pattern": "^[a-f0-9]{64}$",
+      "type": "string"
+    },
+    "source_revision": {
+      "exclusiveMinimum": 0,
+      "maximum": 9007199254740991,
+      "type": "integer"
+    },
+    "source_revision_id": {
+      "format": "uuid",
+      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+      "type": "string"
+    },
+    "values": {
+      "additionalProperties": {
+        "anyOf": [
+          {
+            "maxLength": 10000,
+            "type": "string"
+          },
+          {
+            "type": "number"
+          }
+        ]
+      },
+      "propertyNames": {
+        "maxLength": 80,
+        "minLength": 1,
+        "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "width": {
+      "exclusiveMinimum": 0,
+      "maximum": 9007199254740991,
+      "type": "integer"
+    }
+  },
+  "required": [
+    "artifact_id",
+    "project_id",
+    "source_revision_id",
+    "source_revision",
+    "source_hash",
+    "runtime_identity",
+    "composition_id",
+    "frame",
+    "width",
+    "height",
+    "fps",
+    "frame_hash",
+    "media_asset_id",
+    "controls",
+    "values"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / slides / items / properties / visual / properties / crop

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "height": {
+      "exclusiveMinimum": 0,
+      "maximum": 1,
+      "type": "number"
+    },
+    "left": {
+      "maximum": 1,
+      "minimum": 0,
+      "type": "number"
+    },
+    "top": {
+      "maximum": 1,
+      "minimum": 0,
+      "type": "number"
+    },
+    "width": {
+      "exclusiveMinimum": 0,
+      "maximum": 1,
+      "type": "number"
+    }
+  },
+  "required": [
+    "left",
+    "top",
+    "width",
+    "height"
+  ],
+  "type": "object"
+}

changedOutput schema / properties / slides / items / properties / visual / properties / kind / enum

Previous value: -[
-  "media_asset",
-  "generate",
-  "solid",
-  "gradient",
-  "html",
-  "template"
-]New value: +[
+  "creative_source",
+  "media_asset",
+  "generate",
+  "solid",
+  "gradient",
+  "html",
+  "template"
+]

addedOutput schema / properties / txid

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / required

Added value: +[
+  "project_id",
+  "revision",
+  "name",
+  "platform",
+  "locale",
+  "frame",
+  "style",
+  "slides",
+  "templates",
+  "can_undo",
+  "warnings",
+  "next_actions",
+  "txid",
+  "mutationReceipt"
+]

AddedOct 15, 2026

TDQS

C2.9/5.0

Behavior3/5

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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description usefully reinforces this by saying the current slide document is replaced, but it does not say how far back the revision goes, whether the operation can itself be undone, or what happens if no prior revision exists.

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

Conciseness4/5

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

A single efficient sentence with the action front-loaded and no filler. It is appropriately short, though the brevity borders on under-specification rather than being optimally sized.

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

Completeness2/5

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 cover the safety profile. But for a destructive, low-coverage-parameter mutation, the description leaves key call-time questions unanswered: revision depth, undo-of-undo behavior, and the role of idempotencyKey and workspaceId.

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

Parameters2/5

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

Schema description coverage is only 33% (just a trivial 'UUID string' for projectId), leaving workspaceId and idempotencyKey undocumented, and the description adds nothing about any parameter — not even which project's carousel is targeted. With low coverage the description needed to compensate and does not.

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 (Restore) and resource (previous carousel document revision) and notes the replace semantics, which separates it from additive siblings like carousels_slides_insert or carousels_patch_slide. It does not, however, distinguish itself from editor_edit_undo, and the mismatch between the slide-oriented name and the 'document revision' wording leaves the scope slightly ambiguous.

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

Usage Guidelines2/5

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

No when-to-use guidance, no prerequisites, and no mention of the obvious alternative editor_edit_undo or of when an undo is unavailable (e.g., no prior revision). The agent must infer everything from the name.

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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