find_field_references
Find where a table field is used — its dictionary entry plus any scripts (business rules, script includes, client scripts, UI actions, widgets) that mention the field name. Use it before renaming or removing a field. Script matches are substring (LIKE) hits, so expect false positives (comments, s...
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What find_field_references does on NowAIKit — ServiceNow AI Toolkit
AI agents call find_field_references to retrieve information from NowAIKit — ServiceNow AI Toolkit without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why find_field_references is rated Low
Even though find_field_references only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs find_field_references safely
PolicyLayer is an MCP gateway: it sits between your AI agents and NowAIKit — ServiceNow AI Toolkit, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For find_field_references, this is the rule to start with:
find_field_references is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect NowAIKit — ServiceNow AI Toolkit, apply this rule, and every find_field_references call is checked against it from then on.
Questions about find_field_references
Find where a table field is used — its dictionary entry plus any scripts (business rules, script includes, client scripts, UI actions, widgets) that mention the field name. Use it before renaming or removing a field. Script matches are substring (LIKE) hits, so expect false positives (comments, similarly-named symbols) and misses for dynamically-built references; treat results as candidates to review, not a definitive list. It is categorised as a Read tool in the NowAIKit — ServiceNow AI Toolkit MCP Server, which means it retrieves data without modifying state.
Register the NowAIKit — ServiceNow AI Toolkit MCP server in PolicyLayer and add a rule for find_field_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 NowAIKit — ServiceNow AI Toolkit. Nothing to install.
find_field_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 find_field_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 find_field_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.
find_field_references is provided by the NowAIKit — ServiceNow AI Toolkit MCP server (nowaikit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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