list_data_sources
List Import Set data source definitions (file/JDBC/REST loaders)
This record as markdown: /tools/servicenow-mcp-server/list-data-sources.md
What list_data_sources does on ServiceNow MCP Server
AI agents call list_data_sources 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 list_data_sources is rated Low
This tool retrieves and lists configuration information about Import Set data sources (file/JDBC/REST loaders). It performs a query operation with no side effects—no data is created, modified, deleted, or executed. The blast radius is minimal as it only exposes informational metadata that would typically be accessible to administrators or service accounts. Listing data sources is a standard read-only operation.
From the tool's definition Tool name 'list_data_sources' and description 'List Import Set data source definitions' indicate retrieval of metadata about existing data sources without modification or deletion.
Attacks that exploit this kind of access
The rule that runs list_data_sources 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 list_data_sources, this is the rule to start with:
list_data_sources 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 list_data_sources call is checked against it from then on.
Questions about list_data_sources
List Import Set data source definitions (file/JDBC/REST loaders). 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 list_data_sources: 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.
list_data_sources 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_data_sources 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_data_sources. 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_data_sources 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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