select_object
Select an object and make it active. If add=False (default), deselects all others first.
This record as markdown: /tools/dwgx-blender-copilot/select-object.md
What select_object does on Blender Copilot MCP Server
AI agents invoke select_object to trigger actions in Blender Copilot MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why select_object is rated High
Selecting an object in Blender changes application state (active object, selection context) which can affect subsequent operations. It's not a pure read (has side effects on scene state), not a write to data, but an execution of a Blender operation that modifies the editor's interactive state. Severity is low since it only changes selection state and doesn't modify geometry or scene data.
From the tool's definition 'Select an object and make it active' and 'deselects all others first' — triggers a UI/scene state change in Blender, affecting selection state and active object context
Attacks that exploit this kind of access
The rule that runs select_object safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Blender Copilot MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For select_object, this is the rule to start with:
select_object stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Blender Copilot MCP Server, apply this rule, and every select_object call is checked against it from then on.
Questions about select_object
Select an object and make it active. If add=False (default), deselects all others first. It is categorised as a Execute tool in the Blender Copilot MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Blender Copilot MCP Server MCP server in PolicyLayer and add a rule for select_object: 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 Blender Copilot MCP Server. Nothing to install.
select_object is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the select_object 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 select_object. 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.
select_object is provided by the Blender Copilot MCP Server MCP server (dwgx/blender-copilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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