BlitzReels Video Editor

Clone Carousel

carousels_clone

Idempotent

Duplicate a carousel onto a new project. Copies slots. Icon and shot values may be pack filenames or asset:<media_asset_id>.

Input Schema

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

Output Schema

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

Schema Changelog

Changes observed during successful MCP inspections.

Changed5 schema fields changedOct 18, 2026

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 / 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"
+]

AddedSep 17, 2026

TDQS

C2.9/5.0

Behavior3/5

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

Annotations already declare readOnly=false, destructive=false, and idempotent=true, so the safety profile is covered. The description adds a useful trait — 'Copies slots' — clarifying that slot content is duplicated, but it does not state source-carousel behavior or side effects on the origin. Some added value on top of annotations.

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?

Three short sentences, front-loaded with the purpose. Little waste, though the trailing icon/shot sentence is misaligned with the actual schema and reads as tangential rather than essential.

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 described, but with 4 parameters at 25% coverage the description should explain the required idempotencyKey/projectId semantics and the optional name/workspaceId. It omits these and instead references fields not present in the schema, leaving the definition inadequate for a mutation tool.

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 coverage is only 25% (only projectId documented), so the description must compensate — and it does not. Worse, it discusses 'Icon and shot values' that do not correspond to any of the four parameters (name, projectId, workspaceId, idempotencyKey) and nested objects are absent, so this reference is confusing rather than clarifying. name, workspaceId, and idempotencyKey are left unexplained.

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 and resource ('Duplicate a carousel') plus a target scope ('onto a new project'), which cleanly distinguishes it from siblings like carousels_apply_template and carousels_migrate. It stops short of explicitly naming an alternative, but the core operation is unambiguous.

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?

There is no when-to-use / when-not-to-use guidance and no alternative tool is named. 'Onto a new project' implies context but leaves the agent to infer the conditions that select this over carousels_migrate or carousels_apply_template.

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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