MorphaReels

Duplicate layer

duplicate_layer

Composition primitive: clone a leaf (image. / video. / shapes. / text.) count times, applying a cumulative per-step transform — copy i is offset by i·(dx,dy) px, rotated by i·d_rotation°, and scaled by d_scale^i. One call instead of dozens: a circle of stars (dx/dy + d_rotation), a row of chevrons (dx), a fractal (d_scale<1 + d_rotation), a staggered grid. Styles are copied; animate the result afterwards (e.g. group + a cycle-loop track for endless marching).

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "elementId": "<elementId>",
      "count": "<count>",
      "projectId": "<projectId>"
    },
    "name": "duplicate_layer"
  }
}

Input Schema

Name	Required	Description
`dx`	No	Per-step x offset in px.
`dy`	No	Per-step y offset in px.
`count`	Yes	Number of copies to create.
`d_scale`	No	Per-step size multiplier (1 = no change).
`elementId`	Yes	Leaf to clone (e.g. shapes.chevron-1).
`projectId`	Yes	Opaque project id (a v4 UUID, from list_projects/create_project). Selects which existing project this call mutates.
`d_rotation`	No	Per-step rotation in degrees.

Output Schema

Name	Required	Description
`ok`	Yes	Whether the call succeeded.
`data`	No	The payload, shaped by the tool.
`note`	No	What to do next when not ready.
`error`	No	Why it failed.
`status`	No	For cache-backed readers: whether the answer was ready.
`editorUrl`	No	Opens this project in the editor.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedSep 17, 2026

removedInput schema / properties / anonymousToken

Removed value: -{
-  "description": "The token create_anonymous_account returned. This connection has no Morpha key, so every call carries it.",
-  "type": "string"
-}

changedInput schema / required

Previous value: -[
-  "elementId",
-  "count",
-  "projectId",
-  "anonymousToken"
-]New value: +[
+  "elementId",
+  "count",
+  "projectId"
+]

Changed1 schema field changedSep 15, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "The result envelope every Morpha tool returns.",
+  "properties": {
+    "data": {
+      "description": "The payload, shaped by the tool.",
+      "type": [
+        "object",
+        "array",
+        "string",
+        "number",
+        "boolean",
+        "null"
+      ]
+    },
+    "editorUrl": {
+      "description": "Opens this project in the editor.",
+      "type": "string"
+    },
+    "error": {
+      "description": "Why it failed.",
+      "type": "string"
+    },
+    "note": {
+      "description": "What to do next when not ready.",
+      "type": "string"
+    },
+    "ok": {
+      "description": "Whether the call succeeded.",
+      "type": "boolean"
+    },
+    "status": {
+      "description": "For cache-backed readers: whether the answer was ready.",
+      "enum": [
+        "ready",
+        "not-ready"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "ok"
+  ],
+  "type": "object"
+}

Changed2 schema fields changedSep 11, 2026

addedInput schema / properties / anonymousToken

Added value: +{
+  "description": "The token create_anonymous_account returned. This connection has no Morpha key, so every call carries it.",
+  "type": "string"
+}

changedInput schema / required

Previous value: -[
-  "elementId",
-  "count",
-  "projectId"
-]New value: +[
+  "elementId",
+  "count",
+  "projectId",
+  "anonymousToken"
+]

First observedSep 7, 2026

TDQS

A4.7/5.0

Behavior5/5

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

Discloses the exact per-step math (i·(dx,dy), i·d_rotation, d_scale^i), states that 'Styles are copied', and suggests a follow-up animation workflow. These details go well beyond the annotations, which only indicate a non-read-only, non-destructive mutation.

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?

Dense but efficient: the first sentence defines the operation, the second gives canonical use cases, and the third closes with workflow advice. Every sentence earns its place with no filler.

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

Completeness5/5

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

For a seven-parameter composition primitive, this is complete: it defines legal element ids, the transform math, examples, and what happens to styles, while the output schema covers return values. The annotations cover the mutation profile, so no safety information is missing.

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

Parameters4/5

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

Schema coverage is 100%, so the schema already documents every parameter. The description adds relational meaning by explaining how parameters accumulate across copies and by naming the d_scale^i formula, going just beyond the baseline.

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 ('clone') and resource ('leaf (image.<id> / video.<id> / shapes.<id> / text.<id>)') and includes an exact cumulative transform formula. The 'Composition primitive' framing separates it from add_* layer tools and duplicate_project.

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?

Gives clear usage context: 'One call instead of dozens' plus concrete patterns (circle of stars, row of chevrons, fractal, staggered grid). It doesn't explicitly name alternatives or say when not to use it, but the examples strongly imply copy-with-transform scenarios.

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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