runtime_anim_play
Play an animation on a LIVE AnimationPlayer node. DESTRUCTIVE (drives the running game) — gated by confirmation. Omit animation to (re)play the currently-assigned one.
This record as markdown: /tools/breakpoint-mcp/runtime-anim-play.md
What runtime_anim_play does on Breakpoint
AI agents use runtime_anim_play to create or update resources in Breakpoint, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Breakpoint environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
path | string | Yes | Path to an AnimationPlayer node in the running scene |
peer | string | — | Headless peer id from runtime_spawn_peers; omit for the default running game. |
confirm | boolean | — | Skip the confirmation prompt (auto-approve) |
from_end | boolean | — | Start playback from the end (default false) |
animation | string | — | Animation name to play (default: the current/assigned animation) |
custom_speed | number | — | Playback speed multiplier (default 1.0; negative not supported here) |
Parameters from the server's own tool schema.
Why runtime_anim_play is rated Medium
An AI agent can call runtime_anim_play faster than any human can review: one bad instruction and it creates or modifies resources in Breakpoint by the hundred, each call as confident as the last.
Risk signalsAccepts file system path (path)
Attacks that exploit this kind of access
The rule that runs runtime_anim_play safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Breakpoint, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For runtime_anim_play, this is the rule to start with:
runtime_anim_play 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 Breakpoint, apply this rule, and every runtime_anim_play call is checked against it from then on.
Questions about runtime_anim_play
Play an animation on a LIVE AnimationPlayer node. DESTRUCTIVE (drives the running game) — gated by confirmation. Omit animation to (re)play the currently-assigned one. It is categorised as a Write tool in the Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
runtime_anim_play accepts 6 parameters: path, peer, confirm, from_end, animation, custom_speed. Required: path. The full parameter table on this page comes from the server's own tool schema.
Register the Breakpoint MCP server in PolicyLayer and add a rule for runtime_anim_play: 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 Breakpoint. Nothing to install.
runtime_anim_play 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 runtime_anim_play 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 runtime_anim_play. 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.
runtime_anim_play is provided by the Breakpoint MCP server (breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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