Kursach_StealthAction/.agent/skills/navigation-modifier-volume-add/SKILL.md

name	description	metadata
navigation-modifier-volume-add	Add and configure a `NavMeshModifierVolume` on a GameObject. A modifier volume marks a box-shaped region of space so that any NavMesh baked inside it is assigned a specific area (e.g. a non-walkable or higher-cost zone).	generated-by mcp-plugin-dotnet

Navigation / Add NavMeshModifierVolume

Add a NavMeshModifierVolume to a GameObject. Unlike a NavMeshModifier (which is tied to geometry), a volume affects whatever NavMesh is generated inside its box region.

Inputs

• gameObjectRef — the GameObject to add the volume to (required).
• size — the box size of the volume (default 4,4,4).
• center — the box center offset (default 0,0,0).
• area — the NavMesh area index assigned inside the volume (default 0 = Walkable).

Behavior

Adds (or reuses) a NavMeshModifierVolume, assigns size / center / area, marks the scene dirty, and repaints. Runs on the Unity main thread.

How to Call

unity-mcp-cli run-tool navigation-modifier-volume-add --input '{
  "gameObjectRef": "string_value",
  "size": "string_value",
  "center": "string_value",
  "area": 0
}'

For complex input (multi-line strings, code), save the JSON to a file and use:

unity-mcp-cli run-tool navigation-modifier-volume-add --input-file args.json

Or pipe via stdin (recommended):

unity-mcp-cli run-tool navigation-modifier-volume-add --input-file - <<'EOF'
{"param": "value"}
EOF

Troubleshooting

If unity-mcp-cli is not found, either install it globally (npm install -g unity-mcp-cli) or use npx unity-mcp-cli instead. Read the /unity-initial-setup skill for detailed installation instructions.

Input

Name	Type	Required	Description
gameObjectRef	any	Yes	Reference to the GameObject to add the NavMeshModifierVolume to.
size	any	No	Box size of the volume.
center	any	No	Box center offset of the volume.
area	integer	No	NavMesh area index assigned inside the volume (0 = Walkable).

Input JSON Schema

{
  "type": "object",
  "properties": {
    "gameObjectRef": {
      "$ref": "#/$defs/AIGD.GameObjectRef"
    },
    "size": {
      "$ref": "#/$defs/UnityEngine.Vector3"
    },
    "center": {
      "$ref": "#/$defs/UnityEngine.Vector3"
    },
    "area": {
      "type": "integer"
    }
  },
  "$defs": {
    "UnityEngine.EntityId": {
      "type": "string",
      "pattern": "^[0-9]+$"
    },
    "System.Type": {
      "type": "string"
    },
    "AIGD.GameObjectRef": {
      "type": "object",
      "properties": {
        "instanceID": {
          "$ref": "#/$defs/UnityEngine.EntityId",
          "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)"
        },
        "path": {
          "type": "string",
          "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2."
        },
        "name": {
          "type": "string",
          "description": "Name of a GameObject in hierarchy. Priority: 3."
        },
        "assetType": {
          "$ref": "#/$defs/System.Type",
          "description": "Type of the asset."
        },
        "assetPath": {
          "type": "string",
          "description": "Path to the asset within the project. Starts with 'Assets/'"
        },
        "assetGuid": {
          "type": "string",
          "description": "Unique identifier for the asset."
        }
      },
      "required": [
        "instanceID"
      ],
      "description": "Find GameObject in opened Prefab or in the active Scene."
    },
    "UnityEngine.Vector3": {
      "type": "object",
      "properties": {
        "x": {
          "type": "number"
        },
        "y": {
          "type": "number"
        },
        "z": {
          "type": "number"
        }
      },
      "required": [
        "x",
        "y",
        "z"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "gameObjectRef"
  ]
}

Output

Output JSON Schema

{
  "type": "object",
  "properties": {
    "result": {
      "$ref": "#/$defs/com.IvanMurzak.Unity.MCP.Editor.API.Tool_Navigation-ModifierVolumeAddResponse"
    }
  },
  "$defs": {
    "AIGD.GameObjectRef": {
      "type": "object",
      "properties": {
        "instanceID": {
          "$ref": "#/$defs/UnityEngine.EntityId",
          "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)"
        },
        "path": {
          "type": "string",
          "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2."
        },
        "name": {
          "type": "string",
          "description": "Name of a GameObject in hierarchy. Priority: 3."
        },
        "assetType": {
          "$ref": "#/$defs/System.Type",
          "description": "Type of the asset."
        },
        "assetPath": {
          "type": "string",
          "description": "Path to the asset within the project. Starts with 'Assets/'"
        },
        "assetGuid": {
          "type": "string",
          "description": "Unique identifier for the asset."
        }
      },
      "required": [
        "instanceID"
      ],
      "description": "Find GameObject in opened Prefab or in the active Scene."
    },
    "UnityEngine.EntityId": {
      "type": "string",
      "pattern": "^[0-9]+$"
    },
    "System.Type": {
      "type": "string"
    },
    "AIGD.ComponentRef": {
      "type": "object",
      "properties": {
        "index": {
          "type": "integer",
          "description": "Component 'index' attached to a gameObject. The first index is '0' and that is usually Transform or RectTransform. Priority: 2. Default value is -1."
        },
        "typeName": {
          "type": "string",
          "description": "Component type full name. Sample 'UnityEngine.Transform'. If the gameObject has two components of the same type, the output component is unpredictable. Priority: 3. Default value is null."
        },
        "instanceID": {
          "$ref": "#/$defs/UnityEngine.EntityId",
          "description": "instanceID of the UnityEngine.Object. If this is '0', then it will be used as 'null'."
        }
      },
      "required": [
        "index",
        "instanceID"
      ],
      "description": "Component reference. Used to find a Component at GameObject."
    },
    "UnityEngine.Vector3": {
      "type": "object",
      "properties": {
        "x": {
          "type": "number"
        },
        "y": {
          "type": "number"
        },
        "z": {
          "type": "number"
        }
      },
      "required": [
        "x",
        "y",
        "z"
      ],
      "additionalProperties": false
    },
    "com.IvanMurzak.Unity.MCP.Editor.API.Tool_Navigation-ModifierVolumeAddResponse": {
      "type": "object",
      "properties": {
        "gameObjectRef": {
          "$ref": "#/$defs/AIGD.GameObjectRef",
          "description": "Reference to the GameObject hosting the volume."
        },
        "volumeRef": {
          "$ref": "#/$defs/AIGD.ComponentRef",
          "description": "Reference to the NavMeshModifierVolume component."
        },
        "size": {
          "$ref": "#/$defs/UnityEngine.Vector3",
          "description": "Resolved box size."
        },
        "center": {
          "$ref": "#/$defs/UnityEngine.Vector3",
          "description": "Resolved box center."
        },
        "area": {
          "type": "integer",
          "description": "Resolved area index."
        },
        "success": {
          "type": "boolean",
          "description": "Whether the operation succeeded."
        }
      },
      "required": [
        "size",
        "center",
        "area",
        "success"
      ]
    }
  },
  "required": [
    "result"
  ]
}