Traverse the CMDB relationship graph starting from a Configuration Item using
AI agents call traverse_cmdb_graph to retrieve information from Now Sdk Ext without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool traverses (reads) relationships in ServiceNow's Configuration Management Database (CMDB). Traversal is a read-only operation that retrieves and explores existing relationships between configuration items. No data is created, modified, deleted, or executed—it simply navigates and returns relationship information. This is a classic Read operation with minimal blast radius.
From the tool's definition Tool name 'traverse_cmdb_graph' and description fragment 'Traverse the CMDB relationship graph starting from a Configuration Item' indicate querying/navigation of existing configuration data without modification.
Documented attack patterns abuse exactly the kind of access traverse_cmdb_graph gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Now Sdk Ext, and nothing reaches the server without passing your rules. This is the rule we recommend for traverse_cmdb_graph:
{
"version": "1",
"default": "deny",
"tools": {
"traverse_cmdb_graph": {}
}
}traverse_cmdb_graph is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Traverse the CMDB relationship graph starting from a Configuration Item using. It is categorised as a Read tool in the Now Sdk Ext MCP Server, which means it retrieves data without modifying state.
Register the Now Sdk Ext MCP server in PolicyLayer and add a rule for traverse_cmdb_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 Now Sdk Ext. Nothing to install.
traverse_cmdb_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 traverse_cmdb_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 traverse_cmdb_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.
traverse_cmdb_graph is provided by the Now Sdk Ext MCP server (sonisoft-cnanda/now-sdk-ext-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Now Sdk Ext, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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86 Now Sdk Ext tools catalogued and risk-classified — across an index of 43,000+ MCP servers.