AI agents call snow_discover_atf_tests 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 performs discovery and search operations on ATF (Automated Test Framework) tests, returning information about tests that exist in the ServiceNow instance. It has no side effects, does not execute tests, modify test data, or trigger external operations. The filtering and search capabilities are read-only query operations.
From the tool's definition Tool name contains 'discover' and description states it 'Discovers ATF tests in the instance with filtering and search capabilities' — purely retrieval and querying of test metadata with no modification or execution of tests themselves.
Attacks that exploit this kind of access
Discovers ATF tests in the instance with filtering and search capabilities. 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_discover_atf_tests: 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_discover_atf_tests 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_discover_atf_tests 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_discover_atf_tests. 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_discover_atf_tests 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_discover_atf_tests 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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