get_object_layerReturns the layer assigned to a target object, tag, or material in Cinema 4D, or null if unassigned.
Return the layer currently assigned to a target entity (object / tag / material), or null if unassigned.
| Name | Required | Description | Default |
|---|---|---|---|
| target | Yes | Entity to query. |
Changes observed during successful MCP inspections.
v0.5.1Input schema / definitionsRemoved value: -{
- "__schema0": {
- "anyOf": [
- {
- "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"
- }
- ]
- }
-}Input schema / properties / target / allOfRemoved value: -[
- {
- "$ref": "#/definitions/__schema0"
- }
-]Input schema / properties / target / anyOfAdded 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": {
+ "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"
+ },
+ {
+ "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": [
+ "kind"
+ ],
+ "type": "object"
+ }
+ },
+ "required": [
+ "kind",
+ "owner"
+ ],
+ "type": "object"
+ },
+ {
+ "properties": {
+ "id": {
+ "type": "string"
+ },
+ "kind": {
+ "const": "gv_node",
+ "type": "string"
+ },
+ "name": {
+ "type": "string"
+ },
+ "tag": {
+ "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"
+ }
+ },
+ "required": [
+ "kind",
+ "tag"
+ ],
+ "type": "object"
+ }
+]v0.4.3Input schema / definitions / __schema0 / anyOfPrevious 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"
+ }
+]v0.3.1Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds that the result is null when no layer is assigned, which is useful return behavior beyond annotations, though it doesn't cover errors or entity-not-found handling.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
One compact sentence, front-loaded with the action and result, with no filler.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a single-parameter getter with annotations and no output schema, the description covers the essential read-only retrieval and null case. It is slightly incomplete because it doesn't clarify the returned layer format and its parenthetical examples don't match the full schema union.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the target parameter is already fully documented as an anyOf union. The description adds only an incomplete example list '(object / tag / material)' while the schema supports many more kinds, so it does not meaningfully improve on the structured field.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (Return) and resource (layer currently assigned to a target entity) and notes the null case. It does not explicitly differentiate from siblings like list_layers or assign_to_layer, so it falls short of the top score.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this getter versus list_layers, assign_to_layer, or create_layer. The null-if-unassigned note is behavioral context, not usage guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.