File complexity over git history: cyclomatic complexity at past commits. Shows if a file is getting more or less complex. Requires git. Use to track whether a file is improving or degrading. For current snapshot use get_complexity_report; for symbol-level trends use get_symbol_complexity_trend. R...
AI agents call get_complexity_trend to retrieve information from Trace without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only analysis tool that retrieves and presents complexity metrics from git history. It has no side effects, creates no resources, and cannot modify or delete data. It performs data retrieval and analysis similar to other Read category tools like list, get, or fetch operations.
From the tool's definition Tool description explicitly states 'Read-only' and 'Returns JSON'. It retrieves historical complexity metrics from git without modifying code, configuration, or data. The tool queries past commit information to analyze trends.
Documented attack patterns abuse exactly the kind of access get_complexity_trend gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Trace, and nothing reaches the server without passing your rules. This is the rule we recommend for get_complexity_trend:
{
"version": "1",
"default": "deny",
"tools": {
"get_complexity_trend": {}
}
}get_complexity_trend is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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File complexity over git history: cyclomatic complexity at past commits. Shows if a file is getting more or less complex. Requires git. Use to track whether a file is improving or degrading. For current snapshot use get_complexity_report; for symbol-level trends use get_symbol_complexity_trend. Read-only. Returns JSON: { file, snapshots: [{ commit, date, complexity }] }. It is categorised as a Read tool in the Trace MCP Server, which means it retrieves data without modifying state.
Register the Trace MCP server in PolicyLayer and add a rule for get_complexity_trend: 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.
get_complexity_trend 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_complexity_trend 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_complexity_trend. 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_complexity_trend 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.
Deterministic rules across all 178 Trace tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
178 Trace tools catalogued and risk-classified — across an index of 42,500+ MCP servers.