get_type_hierarchy

Walk TypeScript class/interface hierarchy: ancestors (what it extends/implements) and descendants (what extends/implements it). Use to understand inheritance trees. For a flat list of implementations only use get_implementations instead. Read-only. Returns JSON: { name, ancestors: [...], descenda...

SERVERTrace SOURCEnikolai-vysotskyi/trace-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/nikolai-vysotskyi-trace-mcp/get-type-hierarchy.md

WHAT IT DOES

What get_type_hierarchy does on Trace

AI agents call get_type_hierarchy to retrieve information from Trace without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_type_hierarchy is rated Low

This tool retrieves and queries type hierarchy information from source code without creating, modifying, deleting, or executing anything. It is a pure data retrieval operation that generates no side effects. The explicit 'Read-only' designation confirms it belongs in the Read category with low severity risk.

From the tool's definition Tool description explicitly states 'Walk TypeScript class/interface hierarchy', 'understand inheritance trees', and 'Read-only'. Returns JSON data structure with hierarchical information. No side effects or modifications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_type_hierarchy safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Trace, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_type_hierarchy, this is the rule to start with:

get_type_hierarchy Allowed

get_type_hierarchy is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Trace, apply this rule, and every get_type_hierarchy call is checked against it from then on.

FAQ

Questions about get_type_hierarchy

What does the get_type_hierarchy tool do? +

How do I enforce a policy on get_type_hierarchy? +

Register the Trace 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 Trace. Nothing to install.

What risk level is get_type_hierarchy? +

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

Can I rate-limit get_type_hierarchy? +

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.

How do I block get_type_hierarchy completely? +

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.

What MCP server provides get_type_hierarchy? +

get_type_hierarchy is provided by the Trace MCP server (nikolai-vysotskyi/trace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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