{"generated_at":"2026-10-14T20:07:22+00:00","item":{"added_at":"2026-09-07","analysis_method":"independent_manual_review_2026-10-10","assessment_status":"provisional","auth_posture":"auth_required","category":"Web Connector","confidence":"medium","description":"Connects Claude directly to an existing Microsoft, Gmail or IMAP mailbox. Read and organize email, prepare or send messages, and work with supported contacts and calendars. Choose read-only, draft-and-file, or send-and-delete permissions when approving access.","did":"2acc2f14-f336-4b65-97e5-9c56b64bd1ba","documentation_url":"https://mailbox-mcp.com/docs/","editorial_description":{"extended_description":"Works with the mailbox behind Outlook rather than controlling the installed app. Tools handle attachments, threads, aliases, folders, bounces and out-of-office settings. Supported calendar services add availability and meeting management. Shared-mailbox features include assignments, claiming messages and approval-held drafts.","schema_version":1,"summary":"Connects Claude directly to an existing Microsoft, Gmail or IMAP mailbox.\nRead and organize email, prepare or send messages, and work with supported contacts and calendars.\nChoose read-only, draft-and-file, or send-and-delete permissions when approving access."},"homepage_url":"","icon":"","id":"2acc2f14-f336-4b65-97e5-9c56b64bd1ba","installs":0,"last_scanned":"","license":"","long_description":"Works with the mailbox behind Outlook rather than controlling the installed app. Tools handle attachments, threads, aliases, folders, bounces and out-of-office settings. Supported calendar services add availability and meeting management. Shared-mailbox features include assignments, claiming messages and approval-held drafts.","manual_assessment":"high","manual_review":{"all_findings":[{"evidence":"The complete inventory explicitly contains email sending/reply/forward and calendar invitation actions.","reasoning":"These operations communicate externally as the connected user.","risk_type":"messaging_as_user","severity":"high","title":"Sends, replies to and forwards email and meeting invitations","triggering_tools_or_skills":["send_email","reply_email","forward_email","schedule_meeting","forward_event","respond_to_invitation","approve_and_send"]},{"evidence":"The inventory explicitly declares deletion across mailbox, calendar and contacts.","reasoning":"These actions destructively remove meaningful personal/business data.","risk_type":"data_deletion","severity":"high","title":"Deletes mail, events, folders and contacts","triggering_tools_or_skills":["delete_email","delete_event","delete_folder","delete_contact"]}],"assessment_status":"provisional","auth_and_scopes":"Authentication is required for mailbox and calendar identities; exact OAuth scopes, delegated mailboxes and approval-policy enforcement are not documented.","blocked_missing_evidence":null,"confidence":"medium","displayed_risk":"high","evidence_completeness":"partial","manual_overall_risk":"high","official_sources":[{"accessed_at":"2026-10-10T20:24:37Z","url_or_path":"plutosecurity/plutonium@b749c8dc43536c794409be9805edd48063f045e2:app/data/conn/claudesec/2acc2f14-f336-4b65-97e5-9c56b64bd1ba.json","what_it_proves":"Candidate PR #125 record identity (name \"Mailbox MCP\", publisher, type web_connector) and 64 stored tool names; no tool descriptions stored"},{"accessed_at":"2026-09-22T10:46:07Z","url_or_path":"https://api.anthropic.com/api/directory/servers?verified_tier=anthropic,partner,community (snapshot claude-directory-all-tiers-2026-09-22.json)","what_it_proves":"Official Claude Directory listing https://claude.ai/directory/2acc2f14-f336-4b65-97e5-9c56b64bd1ba: complete tool_names inventory (64 tools), remote streamable-http endpoint https://mcp.mailbox-mcp.com/db/mcp, auth_posture auth_required, publisher-declared permissions text, declared sensitive data types, directory tier community"}],"primary_reason":"Mailbox MCP can send external communications and delete email, calendar, folder and contact data.","provisional_risk":null,"publication_recommendation":"accept","requires_runtime_verification":true,"review_key":"claude:2acc2f14-f336-4b65-97e5-9c56b64bd1ba","reviewed_at":"2026-10-10","reviewer_notes":"request_approval and approve_and_send imply governance, but enforcement must be validated. Mail bodies/attachments are high prompt-injection exposure.","risk_domains":{"arbitrary_network_access":"false","authz_ambiguity":"true","browser_control":"false","credential_or_admin_actions":"false","deletes_data":"true","deployment_or_infrastructure":"false","dynamic_hidden_actions":"false","filesystem_or_repo_access":"false","forwards_data_to_third_party":"true","modifies_data":"true","persistent_credentials":"true","prompt_injection_exposure":"true","provenance_uncertainty":"true","reads_private_data":"true","runs_code_or_queries":"false","sends_messages_as_user":"true","spends_or_moves_money":"false"},"tools_or_skills_reviewed":64,"tools_or_skills_total":64},"name":"Mailbox MCP","needs_runtime_verification":true,"plutonium_url":"https://plutonium.pluto.security/detail.html?planet=claudesec&did=2acc2f14-f336-4b65-97e5-9c56b64bd1ba&utm_source=plutonium_analysis_skill&utm_medium=claude_skill&utm_campaign=connector_risk_assessment","privacy_policy_url":"https://mailbox-mcp.com/privacy/","provisional_risk":null,"publication_recommendation":"accept","publisher":"BSolve IT Limited","publisher_url":"https://mailbox-mcp.com/","remote_url":"https://mcp.mailbox-mcp.com/db/mcp","repository_url":"","risk":"high","risk_severity":"high","security_risks":[{"description":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user.","evidence":"Sends, replies to and forwards email and meeting invitations: The complete inventory explicitly contains email sending/reply/forward and calendar invitation actions.","manual_risk_type":"messaging_as_user","remediation":{"block_tool_categories":["sends_externally"],"steps":["Require review before messages, posts, or publications are sent.","Restrict delivery to test or internal recipients where possible."]},"risk_type":"sends_messages_as_you","severity":"high","title":"Sends, replies to and forwards email and meeting invitations","triggering_tools":["send_email","reply_email","forward_email","schedule_meeting","forward_event","respond_to_invitation","approve_and_send"]},{"description":"This connector can permanently remove data or resources. Review findings: These actions destructively remove meaningful personal/business data.","evidence":"Deletes mail, events, folders and contacts: The inventory explicitly declares deletion across mailbox, calendar and contacts.","manual_risk_type":"data_deletion","remediation":{"block_tool_categories":["destructive"],"steps":["Disable destructive tools unless deletion is an explicit workflow requirement.","Require human confirmation and verified backups before deletion."]},"risk_type":"deletes_data","severity":"high","title":"Deletes mail, events, folders and contacts","triggering_tools":["delete_email","delete_event","delete_folder","delete_contact"]}],"signature_status":"unknown","source_code_reviewed":false,"support_url":"https://mailbox-mcp.com/support/","tags":["accesses_calendar","deletes_data","network_access","oauth_required","sends_messages_as_you","web_connector"],"tools":[{"description":"","name":"archive_email"},{"description":"","name":"cancel_meeting"},{"description":"","name":"check_availability"},{"description":"","name":"check_bounces"},{"description":"","name":"check_deliverability"},{"description":"","name":"check_receipts"},{"description":"","name":"check_upload"},{"description":"","name":"clear_out_of_office"},{"description":"","name":"create_event"},{"description":"","name":"create_folder"},{"description":"","name":"create_upload_link"},{"description":"","name":"delete_email","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions destructively remove meaningful personal/business data."}},{"description":"","name":"delete_event","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions destructively remove meaningful personal/business data."}},{"description":"","name":"delete_folder","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions destructively remove meaningful personal/business data."}},{"description":"","name":"dismiss_reminder"},{"description":"","name":"draft_email"},{"description":"","name":"draft_forward"},{"description":"","name":"draft_reply"},{"description":"","name":"find_contact"},{"description":"","name":"find_meeting_times"},{"description":"","name":"flag_email"},{"description":"","name":"forward_email","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"forward_event","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"list_calendars"},{"description":"","name":"list_categories"},{"description":"","name":"list_emails"},{"description":"","name":"list_events"},{"description":"","name":"list_identities"},{"description":"","name":"list_mailboxes"},{"description":"","name":"mark_junk"},{"description":"","name":"mark_read"},{"description":"","name":"mark_unread"},{"description":"","name":"move_email"},{"description":"","name":"not_junk"},{"description":"","name":"propose_new_time"},{"description":"","name":"read_email"},{"description":"","name":"read_event"},{"description":"","name":"read_out_of_office"},{"description":"","name":"read_thread"},{"description":"","name":"rename_folder"},{"description":"","name":"reply_email","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"respond_to_invitation","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"schedule_meeting","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"search_emails"},{"description":"","name":"search_events"},{"description":"","name":"send_email","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"set_out_of_office"},{"description":"","name":"snooze_reminder"},{"description":"","name":"unflag_email"},{"description":"","name":"update_draft"},{"description":"","name":"update_event"},{"description":"","name":"update_meeting"},{"description":"","name":"read_attachment"},{"description":"","name":"claim_email"},{"description":"","name":"release_email"},{"description":"","name":"assign_email"},{"description":"","name":"request_approval"},{"description":"","name":"list_pending_approvals"},{"description":"","name":"approve_and_send","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These operations communicate externally as the connected user."}},{"description":"","name":"read_contact"},{"description":"","name":"create_contact"},{"description":"","name":"update_contact"},{"description":"","name":"delete_contact","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions destructively remove meaningful personal/business data."}},{"description":"","name":"import_contacts"}],"tools_count":64,"transport":"streamable-http","type":"web_connector","url":"https://claude.ai/directory/2acc2f14-f336-4b65-97e5-9c56b64bd1ba","uuid":"95306606-2a1b-50af-bf1f-cab583d0b47b","verification_tier":"community","version":""},"query_key":"mailbox mcp","schema_version":1,"status":"match"}