Group multiple objects under a null object. Args: object_names: List of object names to group group_name: Optional name for the group
AI agents use group_objects to create or update resources in Cinema4D MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Cinema4D MCP Server environment.
This tool creates a null object and places existing objects under it, modifying the scene hierarchy. This is a reversible organizational operation (objects can be ungrouped), making it a Write operation. Misuse potential is low since it only reorganizes existing objects without deleting or executing code.
From the tool's definition Group multiple objects under a null object — creates a new null and reorganizes scene hierarchy
Documented attack patterns abuse exactly the kind of access group_objects gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Cinema4D MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for group_objects:
{
"version": "1",
"default": "deny",
"tools": {
"group_objects": {
"limits": [
{
"counter": "group_objects_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}group_objects 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.
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Group multiple objects under a null object. Args: object_names: List of object names to group group_name: Optional name for the group. It is categorised as a Write tool in the Cinema4D MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Cinema4D MCP Server MCP server in PolicyLayer and add a rule for group_objects: 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 Cinema4D MCP Server. Nothing to install.
group_objects 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 group_objects 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 group_objects. 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.
group_objects is provided by the Cinema4D MCP Server MCP server (ttiimmaacc/cinema4d-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 25 Cinema4D MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
25 Cinema4D MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.