Remove a transition from an Animator Controller state. Can target by source/destination names or by index.
AI agents call unity_animation_remove_transition to permanently remove resources in Unity MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing a transition from an Animator Controller is a destructive operation that deletes configuration data. While Unity projects can be version-controlled, the tool itself performs an irreversible deletion of the transition within the editor state. This falls under Destructive as the removal cannot be undone through the tool itself.
From the tool's definition 'Remove a transition from an Animator Controller state' — irreversibly deletes an animator transition
Documented attack patterns abuse exactly the kind of access unity_animation_remove_transition gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Unity MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for unity_animation_remove_transition:
{
"version": "1",
"default": "deny",
"hide": [
"unity_animation_remove_transition"
]
} unity_animation_remove_transition disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Remove a transition from an Animator Controller state. Can target by source/destination names or by index. It is categorised as a Destructive tool in the Unity MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_animation_remove_transition: 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 Unity MCP Server. Nothing to install.
unity_animation_remove_transition is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the unity_animation_remove_transition 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 unity_animation_remove_transition. 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.
unity_animation_remove_transition is provided by the Unity MCP Server MCP server (anklebreaker-studio/unity-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 324 Unity MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
324 Unity MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.