Overview of the decision knowledge graph: total decisions, active/invalidated counts, breakdown by type and source. Shows how much institutional knowledge is captured. Read-only. Returns JSON: { total, active, invalidated, by_type, by_source, sessions_mined }.
AI agents call get_decision_stats 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 tool purely retrieves and queries existing data without modifying, deleting, executing code, or triggering external operations. The read-only designation and statistical summary nature confirm it fits the Read category with low severity, as the blast radius of misuse is minimal—an AI agent can only view aggregate decision statistics, not alter them or perform consequential actions.
From the tool's definition Tool description explicitly states 'Read-only' and returns statistical overview data (total decisions, active/invalidated counts, breakdown by type and source).
Documented attack patterns abuse exactly the kind of access get_decision_stats 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_decision_stats:
{
"version": "1",
"default": "deny",
"tools": {
"get_decision_stats": {}
}
}get_decision_stats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Overview of the decision knowledge graph: total decisions, active/invalidated counts, breakdown by type and source. Shows how much institutional knowledge is captured. Read-only. Returns JSON: { total, active, invalidated, by_type, by_source, sessions_mined }. 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_decision_stats: 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_decision_stats 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_decision_stats 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_decision_stats. 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_decision_stats 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.
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178 Trace tools catalogued and risk-classified — across an index of 42,500+ MCP servers.