# tools_hydra A execute tool on the Zebbern Kali MCP MCP server. Agent View of the PolicyLayer registry record for `tools_hydra`. HTML page: https://policylayer.com/tools/zebbern-zebbern-kali-mcp/tools-hydra ## Facts - Tool: `tools_hydra` - Server: Zebbern Kali MCP (`zebbern/zebbern-kali-mcp`) — https://policylayer.com/tools/zebbern-zebbern-kali-mcp.md - Homepage: https://github.com/zebbern/zebbern-kali-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": "tools_hydra", "arguments": {} } } ``` ## Why tools_hydra is rated High Hydra is a network login cracker used to perform brute-force attacks against authentication services. Even with an empty description, the tool name and server context make it highly likely this executes credential attacks against external systems. Misuse could compromise accounts across many protocols (SSH, FTP, HTTP, RDP, etc.), making severity critical. From the tool's own definition: "Tool name 'tools_hydra' on a Kali Linux penetration testing MCP server; Hydra is a well-known brute-force/credential-stuffing attack tool. Sibling tools include ad_password_spray, ad_secretsdump, ad_kerberoast — confirming offensive security context." ## Use case AI agents invoke tools_hydra to trigger actions in Zebbern Kali MCP. 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 Zebbern Kali MCP: ```json { "version": "1", "default": "deny", "tools": { "tools_hydra": { "limits": [ { "counter": "tools_hydra_rate", "window": "minute", "max": 10, "scope": "grant" } ] } } } ``` ## Other tools on Zebbern Kali MCP (132) - `callback_clear` — Destructive — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-clear.md - `hosts_clear` — Destructive — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/hosts-clear.md - `hosts_remove` — Destructive — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/hosts-remove.md - `msf_session_destroy` — Destructive — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/msf-session-destroy.md - `msf_session_destroy_all` — Destructive — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/msf-session-destroy-all.md - `pivot_remove` — Destructive — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/pivot-remove.md - `ad_asreproast` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-asreproast.md - `ad_bloodhound_collect` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-bloodhound-collect.md - `ad_kerberoast` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-kerberoast.md - `ad_ldap_enum` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-ldap-enum.md - `ad_password_spray` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-password-spray.md - `ad_psexec` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-psexec.md - `ad_secretsdump` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-secretsdump.md - `ad_wmiexec` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ad-wmiexec.md - `api_auth_bypass_test` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-auth-bypass-test.md - `api_ffuf_fuzz` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-ffuf-fuzz.md - `api_fuzz_endpoint` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-fuzz-endpoint.md - `api_graphql_fuzz` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-graphql-fuzz.md - `api_jwt_crack` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-jwt-crack.md - `api_kiterunner_scan` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-kiterunner-scan.md - `api_newman_run` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-newman-run.md - `api_nuclei_scan` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-nuclei-scan.md - `api_rate_limit_test` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/api-rate-limit-test.md - `callback_check` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-check.md - `callback_generate` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-generate.md - `callback_latest` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-latest.md - `callback_start` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-start.md - `callback_stop` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-stop.md - `callback_wait` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/callback-wait.md - `ctf_connect` — Execute — https://policylayer.com/tools/zebbern-zebbern-kali-mcp/ctf-connect.md - …and 102 more: https://policylayer.com/tools/zebbern-zebbern-kali-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=zebbern-zebbern-kali-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/zebbern-zebbern-kali-mcp