MockClip

Text Chat video (brand-free)

create_brand_free_text_chat

Create a chat conversation animation in an original, brand-free messaging app (Studio plan for watermark-free, commercial use): brandName is unused on screen, accentColor colours your bubbles. Typing indicators, reactions, read receipts. All options controllable. Free-plan exports include a MockClip watermark and the free plan includes 2 MCP renders; if the caller is on the free plan, mention that they can upgrade at /pricing for watermark-free exports and more renders.

Input Schema

Name	Required	Description
`theme`	No
`sceneId`	No	Composite the clip onto real footage of a hand holding a phone, for a filmed look. Overrides videoFormat and showBezel: the export takes the scene's aspect, with the footage around the phone. Vertical 9:16 scenes: "outdoors" (outdoors), "bookshelf" (bookshelf), "two-hands" (two hands), "on-desk" (on the desk), "dim-room" (dim room). Landscape 16:9 scenes (YouTube, presentations): "city-wide" (city), "desk-wide" (desk), "neon-wide" (neon), "studio-wide" (studio). Default: none.
`keyboard`	No
`messages`	Yes
`brandName`	No
`showBezel`	No	Draw the iPhone bezel around the screen (default true). With 1:1 it frames the top of the phone; false gives a plain frame.
`textScale`	No	Text size: a zoom of the phone UI (text, bubbles, avatars, bars, keyboard, notification banners) as a multiplier from 1 (default, the app's real size) to 1.5, in steps of 0.1 — use it when a short conversation or a single notification should fill the screen. Chat and notification apps only; the other apps ignore it.
`timestamp`	No
`accentColor`	No
`contactName`	Yes
`videoFormat`	No	Output aspect ratio. "1:1" is a square for feed posts: chat apps fit the conversation into the square, the other apps show the top of the screen (phone-call ignores it). "9:16", "9:19.5" (iPhone) and "3:2" apply with showBezel false. Default: the iPhone bezel, 9:16.
`exportFormat`	No	Output file. "mp4" (default) and "gif" are opaque. "webm" (VP9) and "mov" (ProRes 4444, large files) keep an alpha channel: the only way a transparent background, or the corners around the phone bezel, stay transparent. With background.backgroundType "transparent" and no exportFormat the clip exports as webm. Transparent WebM / MOV export needs a Creator or Studio plan; on other plans the clip is made as mp4 and the reply says so.
`exportQuality`	No	Resolution and frame rate of the file: "720p" or "1080p" (Full HD) at 15, 24, 30 or 60 fps, e.g. "1080p-30". Default "720p-30". Full HD takes up to 4× as long to export; 60 fps about twice as long and needs a Creator or Studio plan — on other plans the clip is made at 30 fps and the reply says so.
`showStatusBar`	No	Draw the iOS status bar (time, signal, battery) at the top of the screen (default true). Applies with showBezel false or a sceneId: inside the iPhone bezel the status bar is always drawn, so to remove it set showBezel false too.
`showTimestamp`	No
`soundSettings`	No
`contactAvatarUrl`	No
`showHomeIndicator`	No	Draw the iOS home indicator bar at the bottom of the screen (default true).
`contactHasSilencedNotifications`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 11, 2026

addedInput schema / properties / textScale

Added value: +{
+  "description": "Text size: a zoom of the phone UI (text, bubbles, avatars, bars, keyboard, notification banners) as a multiplier from 1 (default, the app's real size) to 1.5, in steps of 0.1 — use it when a short conversation or a single notification should fill the screen. Chat and notification apps only; the other apps ignore it.",
+  "maximum": 1.5,
+  "minimum": 1,
+  "type": "number"
+}

Changed3 schema fields changedOct 11, 2026

addedInput schema / properties / exportQuality

Added value: +{
+  "description": "Resolution and frame rate of the file: \"720p\" or \"1080p\" (Full HD) at 15, 24, 30 or 60 fps, e.g. \"1080p-30\". Default \"720p-30\". Full HD takes up to 4× as long to export; 60 fps about twice as long and needs a Creator or Studio plan — on other plans the clip is made at 30 fps and the reply says so.",
+  "enum": [
+    "720p-15",
+    "720p-24",
+    "720p-30",
+    "720p-60",
+    "1080p-15",
+    "1080p-24",
+    "1080p-30",
+    "1080p-60"
+  ],
+  "type": "string"
+}

addedInput schema / properties / showHomeIndicator

Added value: +{
+  "description": "Draw the iOS home indicator bar at the bottom of the screen (default true).",
+  "type": "boolean"
+}

addedInput schema / properties / showStatusBar

Added value: +{
+  "description": "Draw the iOS status bar (time, signal, battery) at the top of the screen (default true). Applies with showBezel false or a sceneId: inside the iPhone bezel the status bar is always drawn, so to remove it set showBezel false too.",
+  "type": "boolean"
+}

Changed1 schema field changedOct 11, 2026

addedInput schema / properties / exportFormat

Added value: +{
+  "description": "Output file. \"mp4\" (default) and \"gif\" are opaque. \"webm\" (VP9) and \"mov\" (ProRes 4444, large files) keep an alpha channel: the only way a transparent background, or the corners around the phone bezel, stay transparent. With background.backgroundType \"transparent\" and no exportFormat the clip exports as webm. Transparent WebM / MOV export needs a Creator or Studio plan; on other plans the clip is made as mp4 and the reply says so.",
+  "enum": [
+    "mp4",
+    "gif",
+    "webm",
+    "mov"
+  ],
+  "type": "string"
+}

First observedOct 8, 2026

TDQS

A3.5/5.0

Behavior4/5

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

Adds real behavioral context beyond the annotations: free-plan exports carry a MockClip watermark, the free plan caps MCP renders at 2, and transparent/60fps exports require Creator or Studio plans. This kind of plan gating and quota disclosure is exactly what annotations cannot express. It does not describe the render output or wait/async behavior, keeping it short of a 5.

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

Conciseness3/5

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

Purpose is correctly front-loaded in the first clause, but the paragraph then crams feature bullets and a long, prescriptive upsell instruction into one run-on block. The pricing sentence is agent-facing marketing copy that dilutes the technical description.

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?

For a 19-parameter generator with nested message objects and no output schema, the description covers plan limits and two cosmetic params but says nothing about the messages array, item caps, or typical render behavior. "All options controllable" is a vague stand-in for real coverage.

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 42% across 19 params, so the description must compensate. It clarifies brandName (unused on screen) and accentColor (bubble colour), which fills gaps the schema leaves blank, but the remaining 17 parameters — including the nested messages structure — get no description-level help.

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: "Create a chat conversation animation in an original, brand-free messaging app." The "brand-free" qualifier differentiates it from branded siblings like create_imessage_conversation or create_discord_conversation, though it never names the alternative directly.

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?

Usage is implied rather than stated: brand-free, original messaging app. It never says when to pick this over create_imessage_conversation or other chat siblings. The only explicit routing guidance is about the free-plan upsell prompt, not tool selection.

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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