BlitzReels Video Editor

Create Clips

clips_create

Destructive

Create a private BlitzReels clip batch from an existing asset or a user-provided video URL. Supports public social videos, Google Drive, and direct media URLs.

Input Schema

Name	Required	Description	Default
`url`	No	Video URL to import before clipping. Supports social video links, Google Drive file links, and direct video file URLs.
`assetId`	No	Existing BlitzReels video asset ID. Provide assetId or url, not both. UUID string.
`seriesId`	No	Optional Series UUID. Omitted inherits the source Series; null creates standalone clips.
`clipCount`	No	Maximum clips requested. Available source moments and account limits can yield fewer.
`selection`	No	Existing asset only: reviewed candidate IDs to include in order or exclude. Resolve IDs with clips_candidates_list first. Null delegates selection.
`workspaceId`	No	Optional workspace ID. Defaults to the user's default workspace. UUID string.
`clipPresetId`	No	Clip style preset. Use high-retention for High Retention clips or demo-focus for product and screen demos.	default
`captionThemeId`	No	Saved theme UUID or built-in caption look. Omitted inherits Series defaults; null uses workspace captions.
`durationBounds`	No	Requested clip duration bounds. Selection preserves complete moments; minimum cannot exceed maximum.
`idempotencyKey`	No	Retry key. Reuse only with identical inputs.
`autoTrimSilence`	No	Trim silence around selected moments.
`createSharePage`	No	Create a public showcase page where completed clips appear.
`selectedAudioLanguage`	No	Audio language track for a social-video URL, using the language reported by media_import_inspect. Null uses source default. Existing assets and direct files preserve source audio.

Output Schema

Name	Required	Description	Default
`batch`	Yes
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed10 schema fields changedSep 29, 2026

changedInput schema / properties / captionThemeId / description

Previous value: -"Saved theme UUID or built-in caption look. Omitted inherits Series defaults; null uses workspace captions. UUID string."New value: +"Saved theme UUID or built-in caption look. Omitted inherits Series defaults; null uses workspace captions."

removedInput schema / properties / captionThemeId / format
```
Removed value: -"uuid"
```

addedInput schema / properties / clipCount

Added value: +{
+  "description": "Maximum clips requested. Available source moments and account limits can yield fewer.",
+  "maximum": 50,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / durationBounds

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "maxSeconds": {
+          "maximum": 180,
+          "minimum": 1,
+          "type": [
+            "number",
+            "null"
+          ]
+        },
+        "minSeconds": {
+          "maximum": 180,
+          "minimum": 1,
+          "type": [
+            "number",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "minSeconds",
+        "maxSeconds"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Requested clip duration bounds. Selection preserves complete moments; minimum cannot exceed maximum."
+}

addedInput schema / properties / selectedAudioLanguage

Added value: +{
+  "description": "Audio language track for a social-video URL, using the language reported by media_import_inspect. Null uses source default. Existing assets and direct files preserve source audio.",
+  "maxLength": 40,
+  "minLength": 2,
+  "type": "string"
+}

addedInput schema / properties / selection

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "excludeIds": {
+          "items": {
+            "type": "string"
+          },
+          "maxItems": 50,
+          "type": "array",
+          "uniqueItems": true
+        },
+        "includeIds": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "maxItems": 50,
+              "minItems": 1,
+              "type": "array",
+              "uniqueItems": true
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "includeIds",
+        "excludeIds"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Existing asset only: reviewed candidate IDs to include in order or exclude. Resolve IDs with clips_candidates_list first. Null delegates selection."
+}

removedOutput schema / properties / batch / properties / polling / properties / suggestedTool / const
```
Removed value: -"clips_get"
```
addedOutput schema / properties / batch / properties / polling / properties / suggestedTool / enum
```
Added value: +[
+  "clips_get",
+  "clips_status_get"
+]
```
removedOutput schema / properties / result / properties / batch / properties / polling / properties / suggestedTool / const
```
Removed value: -"clips_get"
```
addedOutput schema / properties / result / properties / batch / properties / polling / properties / suggestedTool / enum
```
Added value: +[
+  "clips_get",
+  "clips_status_get"
+]
```

Changed1 schema field changedSep 27, 2026

removedInput schema / properties / confirmRightsToMedia

Removed value: -{
-  "default": false,
-  "description": "Set true only after the user confirms they own the media or have permission to import it. Not needed for an existing BlitzReels asset.",
-  "type": "boolean"
-}

Changed2 schema fields changedSep 10, 2026

changedInput schema / properties / captionThemeId / description

Previous value: -"Optional saved caption theme ID. Null uses workspace default captions. UUID string."New value: +"Saved theme UUID or built-in caption look. Omitted inherits Series defaults; null uses workspace captions. UUID string."

addedInput schema / properties / seriesId

Added value: +{
+  "description": "Optional Series UUID. Omitted inherits the source Series; null creates standalone clips.",
+  "type": "string"
+}

Changed1 schema field changedAug 26, 2026

addedInput schema / properties / confirmRightsToMedia

Added value: +{
+  "default": false,
+  "description": "Set true only after the user confirms they own the media or have permission to import it. Not needed for an existing BlitzReels asset.",
+  "type": "boolean"
+}

First observedAug 5, 2026

TDQS

B3.2/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=false, destructiveHint=true, openWorldHint=true, and idempotentHint=false, covering the mutation/safety profile well. The description adds only that the batch is private, then repeats the URL source-type capability already in the schema. It does not add beyond annotations like async/polling behavior or what gets destroyed.

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?

Two front-loaded sentences with no padding; the core action is stated first. The second sentence is somewhat redundant with the url parameter description, but the overall size is appropriate.

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

Completeness3/5

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

With 13 parameters, no required fields, an output schema, and 100% schema coverage, the structured data carries most of the burden. However, the description omits the end-to-end workflow (list candidates, select, then create/reselect) and any async/status context, leaving gaps for a fairly complex creation tool.

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 100%, so all 13 parameters are fully documented in the schema and the baseline is 3. The description's mention of source URL types duplicates the url parameter's own description rather than adding syntax or constraint detail.

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?

Clear verb+resource: create a private clip batch from an asset or a URL, with the supported source types named. It does not differentiate itself from siblings like clips_reselect, clips_recover, or clips_repair, which also operate on clip batches, so an agent must infer the boundary.

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?

The description names source capabilities (social videos, Google Drive, direct URLs) but gives no when-to-use guidance, no prerequisites, and no routing to alternatives such as clips_reselect or clips_candidates_list. The one useful routing hint ('Resolve IDs with clips_candidates_list first') lives only in the schema, not the description.

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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