Get statistics about the knowledge graph: total entities, average relevance, low-relevance count, oldest/newest access timestamps.
AI agents call get_knowledge_stats to retrieve information from CodeGraph without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves statistical information (counts, averages, timestamps) from the knowledge graph without modifying, deleting, or executing any operations. It is purely informational and read-only, consistent with the 'Read' category for tools that query or retrieve data with no side effects.
From the tool's definition Tool name 'get_knowledge_stats' and description 'Get statistics about the knowledge graph' indicates retrieval of aggregate metadata and statistics with no data modification, deletion, or execution of code.
Documented attack patterns abuse exactly the kind of access get_knowledge_stats gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CodeGraph, and nothing reaches the server without passing your rules. This is the rule we recommend for get_knowledge_stats:
{
"version": "1",
"default": "deny",
"tools": {
"get_knowledge_stats": {}
}
}get_knowledge_stats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get statistics about the knowledge graph: total entities, average relevance, low-relevance count, oldest/newest access timestamps. It is categorised as a Read tool in the CodeGraph MCP Server, which means it retrieves data without modifying state.
Register the CodeGraph MCP server in PolicyLayer and add a rule for get_knowledge_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 CodeGraph. Nothing to install.
get_knowledge_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_knowledge_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_knowledge_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_knowledge_stats is provided by the CodeGraph MCP server (phoenixrr2113/codebase-graph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CodeGraph, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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18 CodeGraph tools catalogued and risk-classified — across an index of 43,000+ MCP servers.