# blender_shaders

A write tool on the Blender MCP server.

Agent View of the PolicyLayer registry record for `blender_shaders`. HTML page: https://policylayer.com/tools/sandraschi-blender-mcp/blender-shaders

## Facts

- Tool: `blender_shaders`
- Server: Blender (`sandraschi/blender-mcp`) — https://policylayer.com/tools/sandraschi-blender-mcp.md
- Homepage: https://github.com/sandraschi/blender-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "blender_shaders",
    "arguments": {}
  }
}
```

## Why blender_shaders is rated Medium

The tool operates within Blender's shader system, which modifies material properties and rendering behavior of 3D objects. This is a reversible modification (shaders can be changed, removed, or reverted), placing it in the Write category. Severity is high because shader changes affect the visual output and could be maliciously altered, but they are not destructive (no data deletion) or irreversible system changes.

From the tool's own definition: "Tool name 'blender_shaders' on a server that 'enables AI-powered control of Blender' and allows users to 'create, manipulate, and automate 3D scenes, objects, materials, animations'. Shader manipulation is a form of material/object modification."

## Use case

AI agents use blender_shaders to create or update resources in Blender, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Blender environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Blender:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "blender_shaders": {
      "limits": [
        {
          "counter": "blender_shaders_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Blender (80)

- `clear_scene` — Destructive — https://policylayer.com/tools/sandraschi-blender-mcp/clear-scene.md
- `agentic_blender_workflow` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/agentic-blender-workflow.md
- `blender_animation` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-animation.md
- `blender_batch` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-batch.md
- `blender_geonodes` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-geonodes.md
- `blender_particles` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-particles.md
- `blender_physics` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-physics.md
- `blender_render` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-render.md
- `blender_sculpt` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-sculpt.md
- `blender_transform` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-transform.md
- `blender_workflow` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/blender-workflow.md
- `generate_blender_script` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/generate-blender-script.md
- `intelligent_3d_processing` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/intelligent-3d-processing.md
- `manage_blender_addons` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/manage-blender-addons.md
- `script_execute` — Execute — https://policylayer.com/tools/sandraschi-blender-mcp/script-execute.md
- `blender_addons` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-addons.md
- `blender_atlasing` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-atlasing.md
- `blender_categories` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-categories.md
- `blender_compositor` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-compositor.md
- `blender_download` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-download.md
- `blender_furniture` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-furniture.md
- `blender_grease_pencil` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-grease-pencil.md
- `blender_health_check` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-health-check.md
- `blender_help` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-help.md
- `blender_materials_baking` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-materials-baking.md
- `blender_performance_monitor` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-performance-monitor.md
- `blender_rigging` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-rigging.md
- `blender_selection` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-selection.md
- `blender_session` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-session.md
- `blender_shapekeys` — Other — https://policylayer.com/tools/sandraschi-blender-mcp/blender-shapekeys.md
- …and 50 more: https://policylayer.com/tools/sandraschi-blender-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=sandraschi-blender-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/sandraschi-blender-mcp