{"generated_at":"2026-10-14T20:07:22+00:00","item":{"added_at":"2026-08-04","analysis_method":"independent_manual_review_2026-10-10","assessment_status":"provisional","auth_posture":"auth_required","category":"Web Connector","confidence":"medium","description":"OnMessage gives Claude access to a company's messaging strategy and library. Read brand guidance and, with edit permissions, update content, audiences, offerings, or personas. A paid account or active trial is required; access follows existing organization roles.","did":"83c06126-e084-4ced-9bfe-f22323ffb362","documentation_url":"https://onmessage.ai/connect","editorial_description":{"extended_description":"Tools manage voice, glossary, brand pillars, documents, and library files. Writes are versioned and reversible in the app, and authorized agency users can switch client organizations.","schema_version":1,"summary":"OnMessage gives Claude access to a company's messaging strategy and library.\nRead brand guidance and, with edit permissions, update content, audiences, offerings, or personas.\nA paid account or active trial is required; access follows existing organization roles."},"homepage_url":"","icon":"","id":"83c06126-e084-4ced-9bfe-f22323ffb362","installs":0,"last_scanned":"","license":"","long_description":"Tools manage voice, glossary, brand pillars, documents, and library files. Writes are versioned and reversible in the app, and authorized agency users can switch client organizations.","manual_assessment":"high","manual_review":{"all_findings":[{"evidence":"The explicit tool removes a durable strategy/library file.","reasoning":"It can destroy shared brand research or messaging records.","risk_type":"data_deletion","severity":"high","title":"Deletes Message Library files","triggering_tools_or_skills":["delete_library_file"]},{"evidence":"These tools broadly persist and version company messaging/brand records.","reasoning":"They materially alter the organization’s source-of-truth library.","risk_type":"data_modification","severity":"medium","title":"Creates/updates brand strategy and library content","triggering_tools_or_skills":["create_audience","create_brand_voice","create_offering","create_persona","update_brand_foundation","update_brand_voice","save_document","write_library_file","edit_library_file"]},{"evidence":"These tools create or change durable files.","reasoning":"They are file-writing actions even though versioning makes changes reversible.","risk_type":"file_write","severity":"medium","title":"Writes, edits and saves library files/documents","triggering_tools_or_skills":["write_library_file","edit_library_file","save_document"]}],"assessment_status":"provisional","auth_and_scopes":"Authentication mirrors the user’s OnMessage organization/file/edit permissions on every request; organization switching is limited to organizations already accessible.","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/83c06126-e084-4ced-9bfe-f22323ffb362.json","what_it_proves":"Candidate PR #125 record identity (name \"OnMessage\", publisher, type web_connector) and 29 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/83c06126-e084-4ced-9bfe-f22323ffb362: complete tool_names inventory (29 tools), remote streamable-http endpoint https://mcp.onmessage.ai/functions/v1/mcp, auth_posture auth_required, directory tier community"}],"primary_reason":"OnMessage can delete shared Message Library files and broadly rewrite brand strategy.","provisional_risk":null,"publication_recommendation":"accept","requires_runtime_verification":true,"review_key":"claude:83c06126-e084-4ced-9bfe-f22323ffb362","reviewed_at":"2026-10-10","reviewer_notes":"Reviewed all 30 tools. Versioning/reversibility is a mitigation but deletion remains High; no external publishing or messaging action is declared.","risk_domains":{"arbitrary_network_access":"false","authz_ambiguity":"false","browser_control":"false","credential_or_admin_actions":"false","deletes_data":"true","deployment_or_infrastructure":"false","dynamic_hidden_actions":"false","filesystem_or_repo_access":"true","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":"false","spends_or_moves_money":"false"},"tools_or_skills_reviewed":29,"tools_or_skills_total":29},"name":"OnMessage","needs_runtime_verification":true,"plutonium_url":"https://plutonium.pluto.security/detail.html?planet=claudesec&did=83c06126-e084-4ced-9bfe-f22323ffb362&utm_source=plutonium_analysis_skill&utm_medium=claude_skill&utm_campaign=connector_risk_assessment","privacy_policy_url":"https://app.onmessage.ai/privacy","provisional_risk":null,"publication_recommendation":"accept","publisher":"OnMessage","publisher_url":"https://onmessage.ai/","remote_url":"https://mcp.onmessage.ai/functions/v1/mcp","repository_url":"","risk":"high","risk_severity":"high","security_risks":[{"description":"This connector can permanently remove data or resources. Review findings: It can destroy shared brand research or messaging records.","evidence":"Deletes Message Library files: The explicit tool removes a durable strategy/library file.","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 Message Library files","triggering_tools":["delete_library_file"]},{"description":"This connector can create, update, configure, or otherwise change connected resources. 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Review findings: They are file-writing actions even though versioning makes changes reversible.","evidence":"Writes, edits and saves library files/documents: These tools create or change durable files.","manual_risk_type":"file_write","remediation":{"block_tool_categories":["state_change"],"steps":["Limit file access to a dedicated working directory.","Review generated or modified files before they are shared or executed."]},"risk_type":"filesystem_access","severity":"medium","title":"Writes, edits and saves library files/documents","triggering_tools":["write_library_file","edit_library_file","save_document"]}],"signature_status":"unknown","source_code_reviewed":false,"support_url":"contact@onmessage.app","tags":["deletes_data","filesystem_access","modifies_data","network_access","oauth_required","web_connector"],"tools":[{"description":"","name":"add_brand_pillar"},{"description":"","name":"add_glossary_term"},{"description":"","name":"create_audience","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: They materially alter the organization’s source-of-truth library."}},{"description":"","name":"create_brand_voice","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: They materially alter the organization’s source-of-truth library."}},{"description":"","name":"create_offering","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: They materially alter the organization’s source-of-truth library."}},{"description":"","name":"create_persona","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: They materially alter the organization’s source-of-truth library."}},{"description":"","name":"deactivate_audience"},{"description":"","name":"deactivate_offering"},{"description":"","name":"deactivate_persona"},{"description":"","name":"delete_library_file","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: It can destroy shared brand research or messaging records."}},{"description":"","name":"edit_library_file","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, change, export, or otherwise write files. Review findings: They are file-writing actions even though versioning makes changes reversible."}},{"description":"","name":"get_library_guide"},{"description":"","name":"list_library_files"},{"description":"","name":"list_organizations"},{"description":"","name":"read_library_file"},{"description":"","name":"remove_brand_pillar"},{"description":"","name":"remove_glossary_term"},{"description":"","name":"save_document","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, change, export, or otherwise write files. Review findings: They are file-writing actions even though versioning makes changes reversible."}},{"description":"","name":"search_library_files"},{"description":"","name":"set_default_brand_voice"},{"description":"","name":"switch_organization"},{"description":"","name":"update_audience"},{"description":"","name":"update_brand_foundation","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: They materially alter the organization’s source-of-truth library."}},{"description":"","name":"update_brand_pillar"},{"description":"","name":"update_brand_voice","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: They materially alter the organization’s source-of-truth library."}},{"description":"","name":"update_glossary_term"},{"description":"","name":"update_offering"},{"description":"","name":"update_persona"},{"description":"","name":"write_library_file","risk":{"category":"state_change","level":"medium","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, change, export, or otherwise write files. Review findings: They are file-writing actions even though versioning makes changes reversible."}}],"tools_count":29,"transport":"streamable-http","type":"web_connector","url":"https://claude.ai/directory/83c06126-e084-4ced-9bfe-f22323ffb362","uuid":"5d83edb2-9e68-56b9-ba26-d531c55bb9b3","verification_tier":"community","version":""},"query_key":"onmessage","schema_version":1,"status":"match"}