# snow_field_mapper Project a source object into a new shape using a target-field → source-field mapping. Useful for shaping data between systems (e.g. inbound integration payload → ServiceNow record fields). Agent View of the PolicyLayer registry record for `snow_field_mapper`. HTML page: https://policylayer.com/tools/serac/snow-field-mapper ## Facts - Tool: `snow_field_mapper` - Server: Serac (`serac-labs/serac`) — https://policylayer.com/tools/serac.md - Homepage: https://github.com/serac-labs/serac - Risk category: Write (Medium risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Rate-limited ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "snow_field_mapper", "arguments": {} } } ``` ## Why snow_field_mapper is rated Medium This tool transforms and writes data into ServiceNow record fields. While the operation is reversible (records can be updated or deleted later), it creates or modifies data objects in the system. The 'high' severity reflects the risk that an AI agent could maliciously map source fields to unintended ServiceNow fields, potentially corrupting records or exposing sensitive data through incorrect field mappings. From the tool's own definition: "Tool projects/transforms a source object into a new shape and maps fields into ServiceNow record fields. The description explicitly mentions shaping data 'inbound integration payload → ServiceNow record fields', indicating creation or modification of records…" ## Use case AI agents use snow_field_mapper to create or update resources in Serac, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Serac environment. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Serac: ```json { "version": "1", "default": "deny", "tools": { "snow_field_mapper": { "limits": [ { "counter": "snow_field_mapper_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## Other tools on Serac (431) - `snow_cleanup_test_artifacts` — Destructive — https://policylayer.com/tools/serac/snow-cleanup-test-artifacts.md - `snow_delete_attachment` — Destructive — https://policylayer.com/tools/serac/snow-delete-attachment.md - `snow_inbound_email_action` — Destructive — https://policylayer.com/tools/serac/snow-inbound-email-action.md - `snow_pa_indicator_manage` — Destructive — https://policylayer.com/tools/serac/snow-pa-indicator-manage.md - `snow_rollback_deployment` — Destructive — https://policylayer.com/tools/serac/snow-rollback-deployment.md - `snow_workflow_transition` — Destructive — https://policylayer.com/tools/serac/snow-workflow-transition.md - `enterprise_tool_execute` — Execute — https://policylayer.com/tools/serac/enterprise-tool-execute.md - `snow_auto_resolve_incident` — Execute — https://policylayer.com/tools/serac/snow-auto-resolve-incident.md - `snow_automate_threat_response` — Execute — https://policylayer.com/tools/serac/snow-automate-threat-response.md - `snow_batch_request` — Execute — https://policylayer.com/tools/serac/snow-batch-request.md - `snow_change_manage` — Execute — https://policylayer.com/tools/serac/snow-change-manage.md - `snow_cicd_deploy` — Execute — https://policylayer.com/tools/serac/snow-cicd-deploy.md - `snow_collect_metric` — Execute — https://policylayer.com/tools/serac/snow-collect-metric.md - `snow_confirm_script_execution` — Execute — https://policylayer.com/tools/serac/snow-confirm-script-execution.md - `snow_convert_es6_to_es5` — Execute — https://policylayer.com/tools/serac/snow-convert-es6-to-es5.md - `snow_convert_to_es5` — Execute — https://policylayer.com/tools/serac/snow-convert-to-es5.md - `snow_create_mobile_action` — Execute — https://policylayer.com/tools/serac/snow-create-mobile-action.md - `snow_create_vulnerability_scan` — Execute — https://policylayer.com/tools/serac/snow-create-vulnerability-scan.md - `snow_custom_api` — Execute — https://policylayer.com/tools/serac/snow-custom-api.md - `snow_elevate_role` — Execute — https://policylayer.com/tools/serac/snow-elevate-role.md - `snow_employee_offboarding` — Execute — https://policylayer.com/tools/serac/snow-employee-offboarding.md - `snow_employee_onboarding` — Execute — https://policylayer.com/tools/serac/snow-employee-onboarding.md - `snow_execute_atf_test` — Execute — https://policylayer.com/tools/serac/snow-execute-atf-test.md - `snow_execute_script` — Execute — https://policylayer.com/tools/serac/snow-execute-script.md - `snow_execute_security_playbook` — Execute — https://policylayer.com/tools/serac/snow-execute-security-playbook.md - `snow_execute_transform` — Execute — https://policylayer.com/tools/serac/snow-execute-transform.md - `snow_fluent_build` — Execute — https://policylayer.com/tools/serac/snow-fluent-build.md - `snow_fluent_install` — Execute — https://policylayer.com/tools/serac/snow-fluent-install.md - `snow_fluent_transform` — Execute — https://policylayer.com/tools/serac/snow-fluent-transform.md - `snow_github_deploy` — Execute — https://policylayer.com/tools/serac/snow-github-deploy.md - …and 401 more: https://policylayer.com/tools/serac.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=serac · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/serac