trend_query
Get time-bucketed trend data for a table (useful for monthly/weekly trend charts)
This record as markdown: /tools/servicenow-mcp-server/trend-query.md
What trend_query does on ServiceNow MCP Server
AI agents call trend_query to retrieve information from ServiceNow MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why trend_query is rated Low
This tool retrieves and queries aggregate trend data from a ServiceNow table to support charting and analytics. It has no side effects, does not modify data, execute code, or trigger external operations. The read-only nature of trend analysis queries places this firmly in the Read category.
From the tool's definition Tool description explicitly states 'Get time-bucketed trend data for a table', using the verb 'Get' which indicates data retrieval.
Attacks that exploit this kind of access
The rule that runs trend_query safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceNow MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For trend_query, this is the rule to start with:
trend_query 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 ServiceNow MCP Server, apply this rule, and every trend_query call is checked against it from then on.
Questions about trend_query
Get time-bucketed trend data for a table (useful for monthly/weekly trend charts). It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for trend_query: 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 MCP Server. Nothing to install.
trend_query 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 trend_query 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 trend_query. 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.
trend_query is provided by the ServiceNow MCP Server MCP server (@aartiq/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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