# ssh-keyscan

Retrieves public host keys from a remote SSH server using

Agent View of the PolicyLayer registry record for `ssh-keyscan`. HTML page: https://policylayer.com/tools/io-github-dave-london-pare-search/ssh-keyscan

## Facts

- Tool: `ssh-keyscan`
- Server: Search (`Dave-London/Pare`) — https://policylayer.com/tools/io-github-dave-london-pare-search.md
- Homepage: https://github.com/Dave-London/Pare
- 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": "ssh-keyscan",
    "arguments": {}
  }
}
```

## Why ssh-keyscan is rated Low

The ssh-keyscan tool performs passive information retrieval of public SSH host keys, which is a standard diagnostic and security operation. It does not modify, execute commands, delete data, or move money. The blast radius is minimal since host keys are public information and the operation cannot cause side effects beyond network connectivity to the target server.

From the tool's own definition: "Tool description states it 'Retrieves public host keys from a remote SSH server' — a read-only operation that queries and returns cryptographic public data with no modification or deletion of data."

## Use case

AI agents call ssh-keyscan to retrieve information from Search 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 Search:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "ssh-keyscan": {}
  }
}
```

## Other tools on Search (201)

- `branch` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/branch.md
- `clean` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/clean.md
- `package-clean` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/package-clean.md
- `remove` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/remove.md
- `reset` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/reset.md
- `secret-delete` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/secret-delete.md
- `stash` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/stash.md
- `tag` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/tag.md
- `variable-delete` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/variable-delete.md
- `workspace` — Destructive — https://policylayer.com/tools/io-github-dave-london-pare-search/workspace.md
- `add` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/add.md
- `add-package` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/add-package.md
- `ansible-galaxy` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/ansible-galaxy.md
- `ansible-playbook` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/ansible-playbook.md
- `api` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/api.md
- `apply` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/apply.md
- `audit` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/audit.md
- `bazel` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/bazel.md
- `biome-check` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/biome-check.md
- `bisect` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/bisect.md
- `black` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/black.md
- `build` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/build.md
- `bundle-exec` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/bundle-exec.md
- `bundle-install` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/bundle-install.md
- `check` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/check.md
- `checkout` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/checkout.md
- `cherry-pick` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/cherry-pick.md
- `clippy` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/clippy.md
- `cmake` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/cmake.md
- `compose-build` — Execute — https://policylayer.com/tools/io-github-dave-london-pare-search/compose-build.md
- …and 171 more: https://policylayer.com/tools/io-github-dave-london-pare-search.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-dave-london-pare-search · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-dave-london-pare-search