# adb_a11y_tree

Dump the accessibility-focused view of the UI hierarchy. Shows only elements relevant to screen readers: their roles, labels, states, and navigation order. Filters out decorative/layout containers.

Agent View of the PolicyLayer registry record for `adb_a11y_tree`. HTML page: https://policylayer.com/tools/io-github-fullread-deepadb/adb-a11y-tree

## Facts

- Tool: `adb_a11y_tree`
- Server: Deepadb (`deepadb`) — https://policylayer.com/tools/io-github-fullread-deepadb.md
- Install: `npx -y deepadb`
- Homepage: https://github.com/fullread/DeepADB
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "adb_a11y_tree",
    "arguments": {}
  }
}
```

## Why adb_a11y_tree is rated Low

This tool performs a query/inspection of the device's UI accessibility tree. It retrieves information about screen reader-relevant elements (roles, labels, states, navigation order) but does not modify, execute, delete, or trigger external actions. The blast radius of misuse is minimal—it only exposes UI metadata that an accessibility tool would normally surface. No financial or destructive impact is possible.

From the tool's own definition: "Tool description states 'Dump the accessibility-focused view of the UI hierarchy' and 'Shows only elements relevant to screen readers' — these are read operations that retrieve and display UI structure without modifying, executing, or deleting anything."

## Use case

AI agents call adb_a11y_tree to retrieve information from Deepadb without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Deepadb:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "adb_a11y_tree": {}
  }
}
```

## Other tools on Deepadb (204)

- `adb_clear_data` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-clear-data.md
- `adb_file_move` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-file-move.md
- `adb_forward_remove` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-forward-remove.md
- `adb_logcat_clear` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-logcat-clear.md
- `adb_qemu_images` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-qemu-images.md
- `adb_result_drop` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-result-drop.md
- `adb_reverse_remove` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-reverse-remove.md
- `adb_rm` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-rm.md
- `adb_tunnel_close` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-tunnel-close.md
- `adb_uninstall` — Destructive — https://policylayer.com/tools/io-github-fullread-deepadb/adb-uninstall.md
- `adb_a11y_audit` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-a11y-audit.md
- `adb_airplane_cycle` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-airplane-cycle.md
- `adb_airplane_mode` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-airplane-mode.md
- `adb_at_batch` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-at-batch.md
- `adb_at_probe` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-at-probe.md
- `adb_at_send` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-at-send.md
- `adb_batch_actions` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-batch-actions.md
- `adb_build_and_install` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-build-and-install.md
- `adb_ci_run_tests` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-ci-run-tests.md
- `adb_ci_wait_boot` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-ci-wait-boot.md
- `adb_connect` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-connect.md
- `adb_disconnect` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-disconnect.md
- `adb_dumpsys` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-dumpsys.md
- `adb_emulator_start` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-emulator-start.md
- `adb_emulator_stop` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-emulator-stop.md
- `adb_farm_run` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-farm-run.md
- `adb_file_chmod` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-file-chmod.md
- `adb_file_chown` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-file-chown.md
- `adb_force_stop` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-force-stop.md
- `adb_forward` — Execute — https://policylayer.com/tools/io-github-fullread-deepadb/adb-forward.md
- …and 174 more: https://policylayer.com/tools/io-github-fullread-deepadb.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-fullread-deepadb · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-fullread-deepadb