AI agents call snow_get_by_sysid to retrieve information from Serac without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data from ServiceNow by a unique identifier. While it can access any record (broad scope), the operation itself is read-only with no mutation, creation, deletion, or execution of code. The severity is low because data retrieval alone has minimal blast radius unless the data itself is sensitive, but misuse would manifest as information disclosure rather than system compromise or data loss.
From the tool's definition Tool name 'snow_get_by_sysid' and description 'Get any ServiceNow record by sys_id with optional field selection' indicate a retrieval operation.
Attacks that exploit this kind of access
Get any ServiceNow record by sys_id with optional field selection. It is categorised as a Read tool in the Serac MCP Server, which means it retrieves data without modifying state.
Register the Serac MCP server in PolicyLayer and add a rule for snow_get_by_sysid: 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 Serac. Nothing to install.
snow_get_by_sysid 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 snow_get_by_sysid 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 snow_get_by_sysid. 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.
snow_get_by_sysid is provided by the Serac MCP server (serac-labs/serac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
snow_get_by_sysid is one line of Serac's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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