get_runtime_call_graph

Actual call graph from runtime traces (vs static analysis). Shows observed call paths with call counts and latency. Requires OTLP trace ingestion. Read-only, queries external runtime data. For static call graph use get_call_graph instead. Returns JSON: { root, calls: [{ symbol, count, latency }] }.

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-runtime-call-graph.md

WHAT IT DOES

What get_runtime_call_graph does on Trace

AI agents call get_runtime_call_graph 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_runtime_call_graph is rated Low

This tool performs data retrieval only—it queries existing runtime traces from an OTLP ingestion system and returns call graph data in JSON format. There are no side effects, modifications, deletions, code execution, or financial operations.

From the tool's definition The tool is described as 'Read-only, queries external runtime data' and 'shows observed call paths with call counts and latency.' It retrieves runtime trace information without modification.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_runtime_call_graph 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_runtime_call_graph, this is the rule to start with:

get_runtime_call_graph Allowed

get_runtime_call_graph 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_runtime_call_graph": {}
  }
}

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_runtime_call_graph call is checked against it from then on.

FAQ

Questions about get_runtime_call_graph

What does the get_runtime_call_graph tool do? +

How do I enforce a policy on get_runtime_call_graph? +

Register the Trace MCP server in PolicyLayer and add a rule for get_runtime_call_graph: 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_runtime_call_graph? +

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

Can I rate-limit get_runtime_call_graph? +

Yes. Add a rate_limit block to the get_runtime_call_graph 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_runtime_call_graph completely? +

Set action: deny in the PolicyLayer policy for get_runtime_call_graph. 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_runtime_call_graph? +

get_runtime_call_graph 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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