# extract_structured_data

Extract structured data from HTML

Agent View of the PolicyLayer registry record for `extract_structured_data`. HTML page: https://policylayer.com/tools/0x-hewm-percepta-mcp/extract-structured-data

## Facts

- Tool: `extract_structured_data`
- Server: Percepta MCP Server (`0x-hewm/percepta-mcp`) — https://policylayer.com/tools/0x-hewm-percepta-mcp.md
- Homepage: https://github.com/0x-hewm/percepta-mcp
- 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": "extract_structured_data",
    "arguments": {}
  }
}
```

## Why extract_structured_data is rated Low

This tool performs data retrieval and parsing operations with no side effects on the target system. It falls squarely into the Read category as it queries and extracts information without creating, modifying, or destroying data.

From the tool's own definition: "The tool name 'extract_structured_data' and description 'Extract structured data from HTML' indicate it retrieves and parses data from web content without modifying it."

## Use case

AI agents call extract_structured_data to retrieve information from Percepta MCP Server 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 Percepta MCP Server:

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

## Other tools on Percepta MCP Server (21)

- `ai_analyze` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/ai-analyze.md
- `ai_chat` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/ai-chat.md
- `ai_generate` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/ai-generate.md
- `browser_click` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-click.md
- `browser_fill` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-fill.md
- `browser_navigate` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-navigate.md
- `browser_wait_for_element` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-wait-for-element.md
- `execute_test_case` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/execute-test-case.md
- `generate_and_execute_test` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/generate-and-execute-test.md
- `generate_test_case` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/generate-test-case.md
- `monitor_and_analyze_page` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/monitor-and-analyze-page.md
- `start_devtools_monitoring` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/start-devtools-monitoring.md
- `analyze_devtools_anomalies` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/analyze-devtools-anomalies.md
- `analyze_image` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/analyze-image.md
- `browser_extract_text` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-extract-text.md
- `browser_screenshot` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-screenshot.md
- `collect_devtools_data` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/collect-devtools-data.md
- `compare_images` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/compare-images.md
- `extract_text_from_image` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/extract-text-from-image.md
- `scrape_website` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/scrape-website.md
- `generate_devtools_report` — Write — https://policylayer.com/tools/0x-hewm-percepta-mcp/generate-devtools-report.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=0x-hewm-percepta-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0x-hewm-percepta-mcp