Inbound edges (who calls/imports this symbol)
AI agents call graph.references to retrieve information from CodeGraph MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries the code graph to find what calls or imports a given symbol. It is purely a read/lookup operation with no side effects, no data modification, and no execution of code. Misuse has minimal blast radius as it only retrieves existing relationship data.
From the tool's definition Inbound edges (who calls/imports this symbol)
Attacks that exploit this kind of access
Inbound edges (who calls/imports this symbol). It is categorised as a Read tool in the CodeGraph MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CodeGraph MCP Server MCP server in PolicyLayer and add a rule for graph.references: 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 MCP Server. Nothing to install.
graph.references 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 graph.references 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 graph.references. 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.
graph.references is provided by the CodeGraph MCP Server MCP server (nabiatech/codegraph-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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