Get full metadata and provenance for a generated asset. Returns comprehensive information about an asset including: - Asset details (dimensions, size, type) - Workflow and prompt information - Full ComfyUI history snapshot (for provenance) - Original submitted workflow (for regeneration context) ...
AI agents call get_asset_metadata to retrieve information from ComfyUI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries and retrieves metadata and provenance information about previously generated assets. It has no side effects, does not modify or delete data, does not execute code, and does not involve financial transactions. The tool is informational only, enabling the AI to inspect asset properties for context in subsequent operations.
From the tool's definition Tool 'get_asset_metadata' retrieves and returns comprehensive information about an asset including dimensions, size, type, workflow, prompt, ComfyUI history, and original workflow.
Documented attack patterns abuse exactly the kind of access get_asset_metadata gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ComfyUI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_asset_metadata:
{
"version": "1",
"default": "deny",
"tools": {
"get_asset_metadata": {}
}
}get_asset_metadata is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get full metadata and provenance for a generated asset. Returns comprehensive information about an asset including: - Asset details (dimensions, size, type) - Workflow and prompt information - Full ComfyUI history snapshot (for provenance) - Original submitted workflow (for regeneration context) This provides iteration context - the AI can see what parameters were used and potentially regenerate with modifications. Args: asset_id: Asset ID from generation tools or list_assets Returns: Dict with complete asset metadata, history, and workflow information. It is categorised as a Read tool in the ComfyUI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ComfyUI MCP Server MCP server in PolicyLayer and add a rule for get_asset_metadata: 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 ComfyUI MCP Server. Nothing to install.
get_asset_metadata is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_asset_metadata 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 get_asset_metadata. 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.
get_asset_metadata is provided by the ComfyUI MCP Server MCP server (joenorton/comfyui-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from ComfyUI MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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15 ComfyUI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.