# break_on_attribute_modified Sets a breakpoint that triggers when any attribute of an element is modified. Useful for tracking hidden field changes, class modifications, etc. Agent View of the PolicyLayer registry record for `break_on_attribute_modified`. HTML page: https://policylayer.com/tools/1600822305-js-reverse-mcp/break-on-attribute-modified ## Facts - Tool: `break_on_attribute_modified` - Server: Js Reverse (`1600822305/js-reverse-mcp`) — https://policylayer.com/tools/1600822305-js-reverse-mcp.md - Homepage: https://github.com/1600822305/js-reverse-mcp - Risk category: Execute (High 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": "break_on_attribute_modified", "arguments": {} } } ``` ## Why break_on_attribute_modified is rated High This tool controls browser debugging behavior by setting DOM breakpoints via Chrome DevTools Protocol. It triggers execution pauses in the browser when attribute modifications occur, which is an external operation that affects browser state and JavaScript execution flow. It's not purely read-only (it modifies debugger state) and qualifies as Execute since it controls browser actions and debugging infrastructure. From the tool's own definition: "Sets a breakpoint that triggers when any attribute of an element is modified" ## Use case AI agents invoke break_on_attribute_modified to trigger actions in Js Reverse. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Js Reverse: ```json { "version": "1", "default": "deny", "tools": { "break_on_attribute_modified": { "limits": [ { "counter": "break_on_attribute_modified_rate", "window": "minute", "max": 10, "scope": "grant" } ] } } } ``` ## Other tools on Js Reverse (92) - `clear_browser_cache` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/clear-browser-cache.md - `clear_cookies` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/clear-cookies.md - `clear_network_conditions` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/clear-network-conditions.md - `delete_cookie` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/delete-cookie.md - `delete_token` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/delete-token.md - `remove_breakpoint` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/remove-breakpoint.md - `remove_dom_breakpoint` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/remove-dom-breakpoint.md - `remove_network_rule` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/remove-network-rule.md - `remove_xhr_breakpoint` — Destructive — https://policylayer.com/tools/1600822305-js-reverse-mcp/remove-xhr-breakpoint.md - `add_network_rule` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/add-network-rule.md - `api_request` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/api-request.md - `batch_replay` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/batch-replay.md - `break_on_node_removed` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/break-on-node-removed.md - `break_on_subtree_modified` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/break-on-subtree-modified.md - `break_on_xhr` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/break-on-xhr.md - `encode_protobuf` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/encode-protobuf.md - `evaluate_on_callframe` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/evaluate-on-callframe.md - `evaluate_script` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/evaluate-script.md - `hook_crypto_functions` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/hook-crypto-functions.md - `hook_function` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/hook-function.md - `monitor_events` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/monitor-events.md - `monitor_eventsource` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/monitor-eventsource.md - `monitor_form_submit` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/monitor-form-submit.md - `monitor_input_changes` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/monitor-input-changes.md - `navigate_page` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/navigate-page.md - `new_page` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/new-page.md - `pause` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/pause.md - `replay_request` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/replay-request.md - `resume` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/resume.md - `set_breakpoint` — Execute — https://policylayer.com/tools/1600822305-js-reverse-mcp/set-breakpoint.md - …and 62 more: https://policylayer.com/tools/1600822305-js-reverse-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=1600822305-js-reverse-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/1600822305-js-reverse-mcp