# sf_create_custom_tab Creates a Custom Web Tab (URL-based tab) that opens an external URL or web page within the Salesforce UI. Different from sf_create_tab which creates object-based tabs. Use when you need a navigation item that points to an external website, an internal Visualforce page by URL, or a custom web app. fullName: API name for the tab (no spaces, e.g. Agent View of the PolicyLayer registry record for `sf_create_custom_tab`. HTML page: https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-custom-tab ## Facts - Tool: `sf_create_custom_tab` - Server: Salesforce Metadata Mcp (`salesforce-metadata-mcp`) — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp.md - Install: `npx -y salesforce-metadata-mcp` - Homepage: https://github.com/semwalajay83-sem/salesforce-metadata-mcp - 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": "sf_create_custom_tab", "arguments": {} } } ``` ## Why sf_create_custom_tab is rated Medium This tool creates a new custom tab object in Salesforce metadata, which is a reversible write operation. It does not execute arbitrary code, delete data, or modify financial records. The severity is medium because creating UI navigation elements could potentially introduce security issues if malicious URLs are configured, but the action itself is reversible and the blast radius is limited to UI configuration. From the tool's own definition: "Tool description states it 'Creates a Custom Web Tab' which is a create operation that adds a new navigational element to the Salesforce UI. The description emphasizes 'Creates' indicating data modification." ## Use case AI agents use sf_create_custom_tab to create or update resources in Salesforce Metadata Mcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Salesforce Metadata Mcp environment. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Salesforce Metadata Mcp: ```json { "version": "1", "default": "deny", "tools": { "sf_create_custom_tab": { "limits": [ { "counter": "sf_create_custom_tab_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## Other tools on Salesforce Metadata Mcp (212) - `sf_bulk_delete_records` — Destructive — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-bulk-delete-records.md - `sf_delete_record` — Destructive — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-delete-record.md - `sf_delete_scratch_org` — Destructive — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-delete-scratch-org.md - `sf_activate_omniscript` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-activate-omniscript.md - `sf_create_apex_class` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-apex-class.md - `sf_create_apex_test_class` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-apex-test-class.md - `sf_create_apex_trigger` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-apex-trigger.md - `sf_create_flow` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-flow.md - `sf_create_scheduled_job` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-scheduled-job.md - `sf_create_scratch_org` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-create-scratch-org.md - `sf_deactivate_flow` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-deactivate-flow.md - `sf_deploy_metadata` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-deploy-metadata.md - `sf_devops_promote_work_item` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-devops-promote-work-item.md - `sf_execute_anonymous_apex` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-execute-anonymous-apex.md - `sf_install_package` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-install-package.md - `sf_promote_devops_work_item` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-promote-devops-work-item.md - `sf_run_apex_tests` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-run-apex-tests.md - `sf_send_email` — Execute — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-send-email.md - `sf_check_code_coverage` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-check-code-coverage.md - `sf_check_deploy_status` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-check-deploy-status.md - `sf_check_devops_commit_status` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-check-devops-commit-status.md - `sf_detect_devops_merge_conflict` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-detect-devops-merge-conflict.md - `sf_explore_slds_blueprints` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-explore-slds-blueprints.md - `sf_export_omnistudio_component` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-export-omnistudio-component.md - `sf_export_records` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-export-records.md - `sf_get_apex_test_results` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-get-apex-test-results.md - `sf_get_dataraptor` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-get-dataraptor.md - `sf_get_deployment_history` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-get-deployment-history.md - `sf_get_event_logs` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-get-event-logs.md - `sf_get_field_history` — Read — https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp/sf-get-field-history.md - …and 182 more: https://policylayer.com/tools/io-github-semwalajay83-sem-salesforce-metadata-mcp.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=io-github-semwalajay83-sem-salesforce-metadata-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-semwalajay83-sem-salesforce-metadata-mcp