get_model_version_by_hash

THE RISK

Low Risk

Why get_model_version_by_hash needs a policy

This is a straightforward data retrieval tool that queries the Civitai API to locate and return model version information. It performs no modifications, deletions, code execution, or financial operations. The input is a hash value used to search for existing data. There is no destructive or write capability implied.

From the tool's definition Tool name 'get_model_version_by_hash' and description 'Find a model version by its file hash' indicate a lookup/query operation with no side effects. The tool retrieves information about a model version based on a cryptographic hash identifier.

Documented attack patterns abuse exactly the kind of access get_model_version_by_hash gives an agent:

POLICY

How to control get_model_version_by_hash

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 get_model_version_by_hash:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_model_version_by_hash": {}
  }
}

get_model_version_by_hash is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Civitai Mcp Ultimate — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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All 21 Civitai Mcp Ultimate tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_model_version_by_hash

What does the get_model_version_by_hash tool do? +

Find a model version by its file hash (SHA256, AutoV2, CRC32, BLAKE3). It is categorised as a Read tool in the Civitai Mcp Ultimate MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_model_version_by_hash? +

Register the Civitai Mcp Ultimate MCP server in PolicyLayer and add a rule for get_model_version_by_hash: 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.

What risk level is get_model_version_by_hash? +

get_model_version_by_hash is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_model_version_by_hash? +

Yes. Add a rate_limit block to the get_model_version_by_hash 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.

How do I block get_model_version_by_hash completely? +

Set action: deny in the PolicyLayer policy for get_model_version_by_hash. 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.

What MCP server provides get_model_version_by_hash? +

get_model_version_by_hash 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.

Enforce policy on every Civitai Mcp Ultimate tool call.

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.

CHECK YOUR STACK →