https://hol.org/guard/security/advisories/mcp-tool-description-poisoning 2026-05-09T00:00:00.000Z monthly 0.56 https://hol.org/guard/security/advisories/prompt-injection-via-issue-comments 2026-05-09T00:00:00.000Z monthly 0.56 https://hol.org/guard/security/advisories/npm-postinstall-script-abuse 2026-05-09T00:00:00.000Z monthly 0.56 https://hol.org/guard/security/advisories/shadow-mcp-server-discovery 2026-05-09T00:00:00.000Z monthly 0.56 https://hol.org/guard/security/advisories/agent-readable-config-poisoning 2026-05-09T00:00:00.000Z monthly 0.56