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List Animation Tracks

list_tracks
Read-only

Enumerate animation tracks on a Cinema 4D entity to retrieve each track's name, parameter ID, component, data type, and key count, enabling keyframe retrieval and modification.

Instructions

Enumerate CTracks on the resolved entity. Returns {name, param_id, component, dtype, key_count} per track so callers can pipe the results straight into get_keyframes / set_keyframe. Vector tracks (Position, Rotation, Scale) surface as separate entries per component.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
handleYesEntity whose animation tracks to enumerate.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changedv0.5.1
    • removedInput schema / definitions
      Removed value: -{
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-}
    • removedInput schema / properties / handle / allOf
      Removed value: -[
-  {
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-  }
-]
    • addedInput schema / properties / handle / anyOf
      Added value: +[
+  {
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+  {
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+      }
+    },
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+    "type": "object"
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+  {
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+        "type": "string"
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+      "render_data": {
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+        "type": "integer"
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+  {
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+            "type": "integer"
+          },
+          {
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+          }
+        ]
+      },
+      "plugin_type": {
+        "enum": [
+          "command",
+          "object",
+          "tag",
+          "material",
+          "shader",
+          "video_post",
+          "scene_loader",
+          "scene_saver",
+          "bitmap_loader",
+          "bitmap_saver",
+          "tool",
+          "preference",
+          "node",
+          "sculpt_brush"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "plugin_id"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "index": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "kind": {
+        "const": "shader",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "owner": {
+        "additionalProperties": {},
+        "description": "Handle of the shader's owner (material, object, tag, video_post, or shader).",
+        "properties": {
+          "kind": {
+            "type": "string"
+          }
+        },
+        "required": [
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+        "type": "object"
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+    },
+    "required": [
+      "kind",
+      "owner"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "kind": {
+        "const": "gv_node",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "tag": {
+        "properties": {
+          "kind": {
+            "const": "tag",
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+          },
+          "object": {
+            "type": "string"
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+          "object_path": {
+            "type": "string"
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+          "tag_name": {
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+        "required": [
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+    },
+    "required": [
+      "kind",
+      "tag"
+    ],
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+]
  2. Changed1 schema field changedv0.4.3
    • changedInput schema / definitions / __schema0 / anyOf
      Previous value: -[
-  {
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-  {
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-]New value: +[
+  {
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+  {
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+    "required": [
+      "kind",
+      "name"
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+  {
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+    "required": [
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+    "type": "object"
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+  {
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+      "render_data": {
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+    "required": [
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+      "type_id"
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+  {
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+        "maximum": 9007199254740991,
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+      "kind": {
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+        "type": "string"
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+      "name": {
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+    "type": "object"
+  },
+  {
+    "properties": {
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+      "kind": {
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+      },
+      "name": {
+        "type": "string"
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+      "tag": {
+        "allOf": [
+          {
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+    },
+    "required": [
+      "kind",
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+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
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+        "type": "string"
+      },
+      "plugin_id": {
+        "anyOf": [
+          {
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+            "minimum": -9007199254740991,
+            "type": "integer"
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+          {
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+        ]
+      },
+      "plugin_type": {
+        "enum": [
+          "command",
+          "object",
+          "tag",
+          "material",
+          "shader",
+          "video_post",
+          "scene_loader",
+          "scene_saver",
+          "bitmap_loader",
+          "bitmap_saver",
+          "tool",
+          "preference",
+          "node",
+          "sculpt_brush"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "plugin_id"
+    ],
+    "type": "object"
+  }
+]
  3. First observedv0.3.1

TDQS

A4.2/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true, so safety is covered. The description adds real behavioral detail beyond that: the exact per-track payload fields and the non-obvious behavior that vector tracks (Position, Rotation, Scale) surface as separate per-component entries rather than one entry.

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?

Three tight sentences, front-loaded with the action and target, then the return shape, then the one edge case. No filler or restated title.

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

Completeness4/5

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

There is no output schema, so the description usefully enumerates the returned keys and the vector-track splitting rule, covering what an agent needs to consume the result. Ordering or volume characteristics of the list are not mentioned, a minor gap.

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% for the single handle parameter, so the baseline is 3. The phrase 'the resolved entity' hints that the handle must resolve to a live entity but adds no format or resolution detail beyond the schema's own description.

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 (Enumerate) and resource (CTracks) scoped to the resolved entity, and the return-shape sentence makes it unmistakably the track-listing tool rather than get_keyframes or delete_track. An agent can distinguish it from siblings without opening the schema.

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?

Explicitly gives downstream usage context: results are meant to be piped into get_keyframes / set_keyframe, which tells the agent where this fits in a workflow. It stops short of stating when NOT to use it or naming an alternative lister for other entity kinds, so it lacks full exclusion guidance.

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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