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mcp-cinema4d

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Describe C4D Entity

describe
Read-only

Retrieve all parameter IDs, names, cycle enums, and current values for any Cinema 4D entity. Use this to identify parameter IDs before reading or writing values.

Instructions

Dump all description parameters (id, name, cycle enum, current value) of a C4D entity resolved by handle. Use this to discover parameter IDs before reading/writing.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
handleYesC4D entity handle. Shapes: {kind:"object",name?|path?}, {kind:"render_data",name}, {kind:"take",name}, {kind:"material",name}, {kind:"layer",name}, {kind:"tag",object?|object_path?,type_id?,tag_name?}, {kind:"video_post",render_data,type_id}, {kind:"shader",owner:<handle>,index}, {kind:"gv_node",tag:<tag handle>,id?|name?} (Xpresso GvNode; use list_xpresso_nodes to discover stable path ids — GvNode inherits BaseList2D so set_params/get_params/describe work on it), {kind:"plugin_options",plugin_id,plugin_type?} (plugin_id accepts an int or a format alias like "abc"/"fbx"/"obj"/"usd"/"gltf"; plugin_type defaults to "scene_saver"; resolves to the plugin's settings BaseList2D — describe+set_params it to configure exporter options before save_document). Prefer `path` over `name` when names are not unique.

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed2 schema fields changedv0.4.3
    • changedInput schema / definitions / __schema0 / anyOf
      Previous value: -[
-  {
-    "properties": {
-      "kind": {
-        "const": "object",
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      },
-      "path": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "render_data",
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "name"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "take",
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "name"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "material",
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "name"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "tag",
-        "type": "string"
-      },
-      "object": {
-        "type": "string"
-      },
-      "object_path": {
-        "type": "string"
-      },
-      "tag_name": {
-        "type": "string"
-      },
-      "type_id": {
-        "maximum": 9007199254740991,
-        "minimum": -9007199254740991,
-        "type": "integer"
-      }
-    },
-    "required": [
-      "kind"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "video_post",
-        "type": "string"
-      },
-      "render_data": {
-        "type": "string"
-      },
-      "type_id": {
-        "maximum": 9007199254740991,
-        "minimum": -9007199254740991,
-        "type": "integer"
-      }
-    },
-    "required": [
-      "kind",
-      "render_data",
-      "type_id"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "index": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "kind": {
-        "const": "shader",
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      },
-      "owner": {
-        "allOf": [
-          {
-            "$ref": "#/definitions/__schema0"
-          }
-        ]
-      }
-    },
-    "required": [
-      "kind",
-      "owner"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "id": {
-        "type": "string"
-      },
-      "kind": {
-        "const": "gv_node",
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      },
-      "tag": {
-        "allOf": [
-          {
-            "$ref": "#/definitions/__schema0"
-          }
-        ]
-      }
-    },
-    "required": [
-      "kind",
-      "tag"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "plugin_options",
-        "type": "string"
-      },
-      "plugin_id": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          {
-            "type": "string"
-          }
-        ]
-      },
-      "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"
-  }
-]New value: +[
+  {
+    "properties": {
+      "kind": {
+        "const": "object",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "path": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "render_data",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "name"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "take",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "name"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "material",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "name"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "layer",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "name"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "tag",
+        "type": "string"
+      },
+      "object": {
+        "type": "string"
+      },
+      "object_path": {
+        "type": "string"
+      },
+      "tag_name": {
+        "type": "string"
+      },
+      "type_id": {
+        "maximum": 9007199254740991,
+        "minimum": -9007199254740991,
+        "type": "integer"
+      }
+    },
+    "required": [
+      "kind"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "video_post",
+        "type": "string"
+      },
+      "render_data": {
+        "type": "string"
+      },
+      "type_id": {
+        "maximum": 9007199254740991,
+        "minimum": -9007199254740991,
+        "type": "integer"
+      }
+    },
+    "required": [
+      "kind",
+      "render_data",
+      "type_id"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "index": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "kind": {
+        "const": "shader",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "owner": {
+        "allOf": [
+          {
+            "$ref": "#/definitions/__schema0"
+          }
+        ]
+      }
+    },
+    "required": [
+      "kind",
+      "owner"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "kind": {
+        "const": "gv_node",
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "tag": {
+        "allOf": [
+          {
+            "$ref": "#/definitions/__schema0"
+          }
+        ]
+      }
+    },
+    "required": [
+      "kind",
+      "tag"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "plugin_options",
+        "type": "string"
+      },
+      "plugin_id": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": -9007199254740991,
+            "type": "integer"
+          },
+          {
+            "type": "string"
+          }
+        ]
+      },
+      "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"
+  }
+]
    • changedInput schema / properties / handle / description
      Previous value: -"C4D entity handle. Shapes: {kind:\"object\",name?|path?}, {kind:\"render_data\",name}, {kind:\"take\",name}, {kind:\"material\",name}, {kind:\"tag\",object?|object_path?,type_id?,tag_name?}, {kind:\"video_post\",render_data,type_id}, {kind:\"shader\",owner:<handle>,index}, {kind:\"gv_node\",tag:<tag handle>,id?|name?} (Xpresso GvNode; use list_xpresso_nodes to discover stable path ids — GvNode inherits BaseList2D so set_params/get_params/describe work on it), {kind:\"plugin_options\",plugin_id,plugin_type?} (plugin_id accepts an int or a format alias like \"abc\"/\"fbx\"/\"obj\"/\"usd\"/\"gltf\"; plugin_type defaults to \"scene_saver\"; resolves to the plugin's settings BaseList2D — describe+set_params it to configure exporter options before save_document). Prefer `path` over `name` when names are not unique."New value: +"C4D entity handle. Shapes: {kind:\"object\",name?|path?}, {kind:\"render_data\",name}, {kind:\"take\",name}, {kind:\"material\",name}, {kind:\"layer\",name}, {kind:\"tag\",object?|object_path?,type_id?,tag_name?}, {kind:\"video_post\",render_data,type_id}, {kind:\"shader\",owner:<handle>,index}, {kind:\"gv_node\",tag:<tag handle>,id?|name?} (Xpresso GvNode; use list_xpresso_nodes to discover stable path ids — GvNode inherits BaseList2D so set_params/get_params/describe work on it), {kind:\"plugin_options\",plugin_id,plugin_type?} (plugin_id accepts an int or a format alias like \"abc\"/\"fbx\"/\"obj\"/\"usd\"/\"gltf\"; plugin_type defaults to \"scene_saver\"; resolves to the plugin's settings BaseList2D — describe+set_params it to configure exporter options before save_document). Prefer `path` over `name` when names are not unique."
  2. First observedv0.3.1

TDQS

A4.1/5.0
Behavior3/5

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

With readOnlyHint=true provided, the description is consistent (no contradiction) and the safety profile is already covered by annotations. The description adds value by specifying output fields and the handle-resolution behavior, but never discloses error behavior for invalid handles or edge cases. This is adequate but not rich additional context beyond the 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?

The main description is two tight sentences with zero filler, front-loading the verb 'Dump' and enumerating exact output fields. The parameter description is long, but every clause earns its place given the complexity of nine handle shapes, and the {' — '} parentheticals pack in workflow guidance without bloat.

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?

For a read-introspection tool with a single parameter and no output schema, the description is nearly complete: it documents output fields, handles all nine resolution shapes with examples, and integrates with the sibling-tool workflow (list_xpresso_nodes, set_params, save_document). The only minor gap is that error behavior on invalid handles is not disclosed, but nothing essential is missing for an agent to call this correctly.

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%, setting baseline at 3, but the description adds substantial meaning beyond the JSON Schema's anyOf shapes: concrete format-alias examples ('abc'/'fbx'/'obj'), the gv_node BaseList2D inheritance note, and the plugin_type default ('scene_saver'). The advice to prefer path over non-unique names is a genuinely useful semantic that the schema could never convey.

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?

The description uses a specific verb and resource: "Dump all description parameters (id, name, cycle enum, current value) of a C4D entity resolved by handle." The output fields are enumerated, and the line "Use this to discover parameter IDs before reading/writing" clearly positions this as the discovery tool within the parameter-access family, distinguishing it from get_params/set_params.

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?

"Use this to discover parameter IDs before reading/writing" provides explicit when-to-use context. The gv_node parameter help names a sibling (list_xpresso_nodes) with an explicit condition, and the plugin_options tip lays out a workflow ("describe+set_params it... before save_document"). However, the main description never explicitly contrasts describe with get_params or states when not to use it.

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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