list_relationship_types
AI agents call list_relationship_types to retrieve information from ServiceNow CMDB 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 and returns a list of relationship types available in the ServiceNow CMDB. It retrieves information without modifying or deleting data, and does not execute external operations or financial transactions. The sibling tools (analyze_configurables, check_connection, cmdb_health_summary, etc.) are predominantly Read/Audit functions, and this tool aligns with that pattern.
From the tool's definition Tool name 'list_relationship_types' indicates retrieval/enumeration of metadata about relationships in the CMDB. No verb suggesting modification (create, update, delete) or execution of operations.
Attacks that exploit this kind of access
list_relationship_types. It is categorised as a Read tool in the ServiceNow CMDB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow CMDB MCP Server MCP server in PolicyLayer and add a rule for list_relationship_types: 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 ServiceNow CMDB MCP Server. Nothing to install.
list_relationship_types 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 list_relationship_types 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 list_relationship_types. 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.
list_relationship_types is provided by the ServiceNow CMDB MCP Server MCP server (ketiil/mcp-cmdb). 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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