AI agents use mark_as_used to create or update resources in Civitai Mcp Ultimate — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Civitai Mcp Ultimate environment.
The name 'mark_as_used' indicates a state-modifying operation that records or updates metadata about a resource's usage status. This is reversible (can be unmarked), so it falls under Write rather than Destructive. Without a description, confidence is moderate.
From the tool's definition Tool named 'mark_as_used' with empty description. Based on naming convention and context of a model/download management server, this likely creates or modifies state (e.g., marking a model or resource as used/consumed).
Documented attack patterns abuse exactly the kind of access mark_as_used gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Civitai Mcp Ultimate, and nothing reaches the server without passing your rules. This is the rule we recommend for mark_as_used:
{
"version": "1",
"default": "deny",
"tools": {
"mark_as_used": {
"limits": [
{
"counter": "mark_as_used_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}mark_as_used 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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mark_as_used. It is categorised as a Write tool in the Civitai Mcp Ultimate MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Civitai Mcp Ultimate MCP server in PolicyLayer and add a rule for mark_as_used: 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 Civitai Mcp Ultimate. Nothing to install.
mark_as_used 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 mark_as_used 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 mark_as_used. 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.
mark_as_used is provided by the Civitai Mcp Ultimate MCP server (timoncool/civitai-mcp-ultimate). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Civitai Mcp Ultimate, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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21 Civitai Mcp Ultimate tools catalogued and risk-classified — across an index of 43,000+ MCP servers.