# mark_seam

A write tool on the Blend Ai MCP server.

Agent View of the PolicyLayer registry record for `mark_seam`. HTML page: https://policylayer.com/tools/holdmybeer-gg-blend-ai/mark-seam

## Facts

- Tool: `mark_seam`
- Server: Blend Ai (`holdmybeer-gg/blend-ai`) — https://policylayer.com/tools/holdmybeer-gg-blend-ai.md
- Homepage: https://github.com/HoldMyBeer-gg/blend-ai
- 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": "mark_seam",
    "arguments": {}
  }
}
```

## Why mark_seam is rated Medium

In Blender, marking seams is a reversible operation that modifies edge metadata in a 3D mesh to control UV unwrapping or subdivision behavior. This is a Write operation (modifies data without deletion). Severity is medium because incorrect seam placement could require manual correction but does not cause data loss or execute arbitrary code.

From the tool's own definition: "Tool name is 'mark_seam'; belongs to a Blender control server with tools like 'add_modifier', 'add_constraint', etc. that create/modify 3D model data. Empty description reduces specificity, but context suggests it modifies mesh topology or edge properties."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Blend Ai (174)

- `clear_animation` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/clear-animation.md
- `delete_collection` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-collection.md
- `delete_keyframe` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-keyframe.md
- `delete_light` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-light.md
- `delete_material` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-material.md
- `delete_object` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-object.md
- `delete_particle_system` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-particle-system.md
- `delete_scene` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/delete-scene.md
- `remove_annotation_layer` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/remove-annotation-layer.md
- `remove_color_ramp_element` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/remove-color-ramp-element.md
- `remove_modifier` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/remove-modifier.md
- `remove_shader_node` — Destructive — https://policylayer.com/tools/holdmybeer-gg-blend-ai/remove-shader-node.md
- `execute_blender_code` — Execute — https://policylayer.com/tools/holdmybeer-gg-blend-ai/execute-blender-code.md
- `render_animation` — Execute — https://policylayer.com/tools/holdmybeer-gg-blend-ai/render-animation.md
- `render_image` — Execute — https://policylayer.com/tools/holdmybeer-gg-blend-ai/render-image.md
- `spin_mesh` — Execute — https://policylayer.com/tools/holdmybeer-gg-blend-ai/spin-mesh.md
- `analyze_mesh_quality` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/analyze-mesh-quality.md
- `get_color_ramp` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/get-color-ramp.md
- `get_node_tree` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/get-node-tree.md
- `get_object_info` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/get-object-info.md
- `get_scene_info` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/get-scene-info.md
- `get_viewport_screenshot` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/get-viewport-screenshot.md
- `list_geometry_node_inputs` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-geometry-node-inputs.md
- `list_keyframes` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-keyframes.md
- `list_lights` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-lights.md
- `list_materials` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-materials.md
- `list_objects` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-objects.md
- `list_procedural_patterns` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-procedural-patterns.md
- `list_recent_files` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-recent-files.md
- `list_scenes` — Read — https://policylayer.com/tools/holdmybeer-gg-blend-ai/list-scenes.md
- …and 144 more: https://policylayer.com/tools/holdmybeer-gg-blend-ai.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=holdmybeer-gg-blend-ai · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/holdmybeer-gg-blend-ai