AI agents call get_type_hierarchy to retrieve information from Srclight without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves structural information about type hierarchies in code—a read-only operation with no side effects. The empty description lowers confidence slightly, but the name and server purpose (deep code indexing for navigation) strongly indicate it queries existing code relationships. No data is created, modified, deleted, or executed.
From the tool's definition Tool name 'get_type_hierarchy' is a retrieval operation on code structure. Server context describes 'explore inheritance' as a core capability, consistent with querying type/class hierarchies without modification.
Documented attack patterns abuse exactly the kind of access get_type_hierarchy gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Srclight, and nothing reaches the server without passing your rules. This is the rule we recommend for get_type_hierarchy:
{
"version": "1",
"default": "deny",
"tools": {
"get_type_hierarchy": {}
}
}get_type_hierarchy is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_type_hierarchy. It is categorised as a Read tool in the Srclight MCP Server, which means it retrieves data without modifying state.
Register the Srclight MCP server in PolicyLayer and add a rule for get_type_hierarchy: 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 Srclight. Nothing to install.
get_type_hierarchy 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 get_type_hierarchy 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 get_type_hierarchy. 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.
get_type_hierarchy is provided by the Srclight MCP server (srclight/srclight). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 42 Srclight tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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42 Srclight tools catalogued and risk-classified — across an index of 42,500+ MCP servers.