Search for code in an indexed project using semantic and keyword search
AI agents call th0th_search to retrieve information from Th0th without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs semantic and keyword search across indexed code, which is a read-only query operation. It retrieves information without creating, modifying, executing, or deleting any data. The context (semantic search for AI assistants, token reduction) further supports this as a safe information-retrieval utility. No side effects or destructive potential.
From the tool's definition Tool description states 'Search for code in an indexed project using semantic and keyword search' — a retrieval operation with no modification or execution capability.
Documented attack patterns abuse exactly the kind of access th0th_search gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Th0th, and nothing reaches the server without passing your rules. This is the rule we recommend for th0th_search:
{
"version": "1",
"default": "deny",
"tools": {
"th0th_search": {}
}
}th0th_search is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search for code in an indexed project using semantic and keyword search. It is categorised as a Read tool in the Th0th MCP Server, which means it retrieves data without modifying state.
Register the Th0th MCP server in PolicyLayer and add a rule for th0th_search: 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 Th0th. Nothing to install.
th0th_search 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 th0th_search 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 th0th_search. 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.
th0th_search is provided by the Th0th MCP server (s1lv4/th0th). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 Th0th tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
21 Th0th tools catalogued and risk-classified — across an index of 42,500+ MCP servers.