validate_query

SERVERServiceNow MCP Server SOURCE@aartiq/servicenow-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/servicenow-mcp-server/validate-query.md

WHAT IT DOES

What validate_query does on ServiceNow MCP Server

AI agents call validate_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.

RISK

Why validate_query is rated Low

This is a static analysis and validation tool that checks query syntax and safety before execution. It does not retrieve data, modify anything, execute queries, delete data, or perform financial operations. The returned results are validation metadata (issues and suggestions), not operational data retrieval.

From the tool's definition Tool description states it performs validation/linting of queries with no execution: 'Lint-check a ServiceNow encoded query BEFORE running it' and 'Returns { valid, issues, suggestions }'.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs validate_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 validate_query, this is the rule to start with:

validate_query Allowed

validate_query is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "validate_query": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ServiceNow MCP Server, apply this rule, and every validate_query call is checked against it from then on.

FAQ

Questions about validate_query

What does the validate_query tool do? +

Lint-check a ServiceNow encoded query BEFORE running it: validates javascript: expressions against the safe function allowlist, length limits, and common mistakes (e.g. using = instead of ^, raw spaces). Returns { valid, issues, suggestions }. It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on validate_query? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for validate_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.

What risk level is validate_query? +

validate_query is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit validate_query? +

Yes. Add a rate_limit block to the validate_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.

How do I block validate_query completely? +

Set action: deny in the PolicyLayer policy for validate_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.

What MCP server provides validate_query? +

validate_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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