Search for symbol definitions (functions, classes, variables, types, interfaces) in an indexed project. Returns name, kind, file location, line numbers, and doc comments.
AI agents call th0th_search_definitions 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.
This tool queries indexed data to retrieve metadata about code symbols (names, locations, documentation). It has no side effects: it does not modify code, execute operations, delete data, or affect external systems. The returned information is read-only discovery of existing definitions. Even in adversarial scenarios, misuse would only result in information disclosure, not code injection or resource compromise.
From the tool's definition Tool 'searches for symbol definitions' and 'returns name, kind, file location, line numbers, and doc comments' — purely a retrieval operation with no modification, deletion, or execution capability.
Documented attack patterns abuse exactly the kind of access th0th_search_definitions 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_definitions:
{
"version": "1",
"default": "deny",
"tools": {
"th0th_search_definitions": {}
}
}th0th_search_definitions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Search for symbol definitions (functions, classes, variables, types, interfaces) in an indexed project. Returns name, kind, file location, line numbers, and doc comments. 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_definitions: 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_definitions 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_definitions 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_definitions. 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_definitions 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.