AI agents call query-knowledge-graph to retrieve information from CodeAnalysis MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name and context indicate read-only querying of a knowledge graph data structure. No description is provided, which slightly lowers confidence, but the 'query' verb and sibling tools strongly suggest a retrieval operation with no side effects. The knowledge graph appears to be built separately ('build-knowledge-graph'), so this tool likely only accesses it.
From the tool's definition Tool name 'query-knowledge-graph' contains 'query', which typically performs data retrieval without modification. The sibling 'build-knowledge-graph' suggests this tool queries an already-constructed graph rather than modifying it.
Documented attack patterns abuse exactly the kind of access query-knowledge-graph gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CodeAnalysis MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for query-knowledge-graph:
{
"version": "1",
"default": "deny",
"tools": {
"query-knowledge-graph": {}
}
}query-knowledge-graph is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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query-knowledge-graph. It is categorised as a Read tool in the CodeAnalysis MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CodeAnalysis MCP Server MCP server in PolicyLayer and add a rule for query-knowledge-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 CodeAnalysis MCP Server. Nothing to install.
query-knowledge-graph 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 query-knowledge-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.
Set action: deny in the PolicyLayer policy for query-knowledge-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.
query-knowledge-graph is provided by the CodeAnalysis MCP Server MCP server (0xjcf/mcp_codeanalysis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CodeAnalysis MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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31 CodeAnalysis MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.