Search submissions by file hash (MD5, SHA1, or SHA256).
AI agents call search_by_hash to retrieve information from Threat Zone MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a passive lookup of malware analysis submissions indexed by cryptographic hash. It retrieves existing threat intelligence data without executing code, modifying records, or triggering sandbox operations.
From the tool's definition Tool name 'search_by_hash' and description 'Search submissions by file hash' indicate a query operation that retrieves data without modification or execution.
Documented attack patterns abuse exactly the kind of access search_by_hash gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Threat Zone MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_by_hash:
{
"version": "1",
"default": "deny",
"tools": {
"search_by_hash": {}
}
}search_by_hash is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search submissions by file hash (MD5, SHA1, or SHA256). It is categorised as a Read tool in the Threat Zone MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Threat Zone MCP Server MCP server in PolicyLayer and add a rule for search_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 Threat Zone MCP Server. Nothing to install.
search_by_hash 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 search_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.
Set action: deny in the PolicyLayer policy for search_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.
search_by_hash is provided by the Threat Zone MCP Server MCP server (threat-zone/threatzonemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Threat Zone 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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31 Threat Zone MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.