blender.assign_materials_by_layer
Assign Blender materials using layer/object names
This record as markdown: /tools/cowork-os/blender.assign-materials-by-layer.md
What blender.assign_materials_by_layer does on CoWork OS
AI agents use blender.assign_materials_by_layer to create or update resources in CoWork OS, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CoWork OS environment.
Why blender.assign_materials_by_layer is rated Medium
This tool modifies Blender scene objects by assigning materials to them based on layer or object names. It is a write operation that changes properties of 3D objects within Blender. The change is reversible (materials can be reassigned or removed), and the blast radius is limited to the local Blender scene with no external system effects.
From the tool's definition Assign Blender materials using layer/object names
Attacks that exploit this kind of access
The rule that runs blender.assign_materials_by_layer safely
PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For blender.assign_materials_by_layer, this is the rule to start with:
blender.assign_materials_by_layer stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every blender.assign_materials_by_layer call is checked against it from then on.
Questions about blender.assign_materials_by_layer
Assign Blender materials using layer/object names. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the CoWork OS MCP server in PolicyLayer and add a rule for blender.assign_materials_by_layer: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches CoWork OS. Nothing to install.
blender.assign_materials_by_layer is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the blender.assign_materials_by_layer rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for blender.assign_materials_by_layer. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
blender.assign_materials_by_layer is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on CoWork OS, and thousands of servers like it.
This server
Across the catalogue