spine_build_animation_from_json
One-step JSON animation pipeline: analyze source JSON, generate animated copy, import to .spine, optionally pack images, export, and open. Use for Spine JSON plus images. Not for .spine sources, mesh, IK, weights, or UI automation.
This record as markdown: /tools/1425sd-spine-mcp/spine-build-animation-from-json.md
What spine_build_animation_from_json does on Spine
AI agents invoke spine_build_animation_from_json to trigger actions in Spine. 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 spine_build_animation_from_json is rated High
This tool executes a multi-step automated pipeline (analyze, generate, import, pack, export, open) that triggers multiple external operations and file system modifications. It spans Write and Execute categories; since it runs a chain of CLI operations with broad effects including file generation, import, and export, Execute is the most appropriate category.
From the tool's definition One-step JSON animation pipeline: analyze source JSON, generate animated copy, import to .spine, optionally pack images, export, and open
Attacks that exploit this kind of access
The rule that runs spine_build_animation_from_json safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Spine, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For spine_build_animation_from_json, this is the rule to start with:
spine_build_animation_from_json 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 Spine, apply this rule, and every spine_build_animation_from_json call is checked against it from then on.
Questions about spine_build_animation_from_json
One-step JSON animation pipeline: analyze source JSON, generate animated copy, import to .spine, optionally pack images, export, and open. Use for Spine JSON plus images. Not for .spine sources, mesh, IK, weights, or UI automation. It is categorised as a Execute tool in the Spine MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Spine MCP server in PolicyLayer and add a rule for spine_build_animation_from_json: 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 Spine. Nothing to install.
spine_build_animation_from_json 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 spine_build_animation_from_json 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 spine_build_animation_from_json. 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.
spine_build_animation_from_json is provided by the Spine MCP server (1425sd/spine-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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