{"generated_at":"2026-10-14T20:07:22+00:00","item":{"added_at":"2026-08-13","analysis_method":"independent_manual_review_2026-10-10","assessment_status":"provisional","auth_posture":"auth_required","category":"Web Connector","confidence":"medium","description":"Formal Logic provides algorithmic logic checks without language-model reasoning dependencies. Solve satisfiability problems, check consistency or entailment, and convert logical forms. Tools also support SMT or first-order proofs and trace-based temporal-logic checking.","did":"ebbb4cc5-e366-4893-80b8-ca491a24960c","documentation_url":"https://reasoning.services/docs/","editorial_description":{"extended_description":"Use the operations to examine contracts, business-rule contradictions, state machines, or system requirements. First-order reasoning uses Z3; simplification and conjunctive or disjunctive normal-form conversion are available.","schema_version":1,"summary":"Formal Logic provides algorithmic logic checks without language-model reasoning dependencies.\nSolve satisfiability problems, check consistency or entailment, and convert logical forms.\nTools also support SMT or first-order proofs and trace-based temporal-logic checking."},"homepage_url":"","icon":"","id":"ebbb4cc5-e366-4893-80b8-ca491a24960c","installs":0,"last_scanned":"","license":"","long_description":"Use the operations to examine contracts, business-rule contradictions, state machines, or system requirements. First-order reasoning uses Z3; simplification and conjunctive or disjunctive normal-form conversion are available.","manual_assessment":"high","manual_review":{"all_findings":[{"evidence":"The listing documents deterministic SAT solving, Z3 SMT/first-order proving, and LTL model checking over caller-supplied formulas and traces.","reasoning":"These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed.","risk_type":"query_execution","severity":"high","title":"User-supplied logical formulas are executed by SAT, SMT, and theorem provers","triggering_tools_or_skills":["fol_prove","smt_prove","ltl_check","is_satisfiable","entails","check_consistency"]}],"assessment_status":"provisional","auth_and_scopes":"Authentication is required for the hosted Formal Logic service; account purpose and retention are not stated.","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/ebbb4cc5-e366-4893-80b8-ca491a24960c.json","what_it_proves":"Candidate PR #125 record identity (name \"Formal Logic\", publisher, type web_connector) and 9 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/ebbb4cc5-e366-4893-80b8-ca491a24960c: complete tool_names inventory (9 tools), remote streamable-http endpoint https://reasoning.services/tools/formal-logic/mcp, auth_posture auth_required, directory tier community"}],"primary_reason":"Formal Logic executes user-supplied SAT, SMT, theorem-proving, and temporal-logic queries.","provisional_risk":null,"publication_recommendation":"accept","requires_runtime_verification":true,"review_key":"claude:ebbb4cc5-e366-4893-80b8-ca491a24960c","reviewed_at":"2026-10-10","reviewer_notes":"Reviewed all nine tools; transformations are deterministic and no filesystem, network, or workspace writes are declared.","risk_domains":{"arbitrary_network_access":"false","authz_ambiguity":"false","browser_control":"false","credential_or_admin_actions":"false","deletes_data":"false","deployment_or_infrastructure":"false","dynamic_hidden_actions":"false","filesystem_or_repo_access":"false","forwards_data_to_third_party":"true","modifies_data":"false","persistent_credentials":"true","prompt_injection_exposure":"false","provenance_uncertainty":"true","reads_private_data":"false","runs_code_or_queries":"true","sends_messages_as_user":"false","spends_or_moves_money":"false"},"tools_or_skills_reviewed":9,"tools_or_skills_total":9},"name":"Formal Logic","needs_runtime_verification":true,"plutonium_url":"https://plutonium.pluto.security/detail.html?planet=claudesec&did=ebbb4cc5-e366-4893-80b8-ca491a24960c&utm_source=plutonium_analysis_skill&utm_medium=claude_skill&utm_campaign=connector_risk_assessment","privacy_policy_url":"https://reasoning.services/privacy/","provisional_risk":null,"publication_recommendation":"accept","publisher":"Reasoning.services","publisher_url":"https://reasoning.services/","remote_url":"https://reasoning.services/tools/formal-logic/mcp","repository_url":"","risk":"high","risk_severity":"high","security_risks":[{"description":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed.","evidence":"User-supplied logical formulas are executed by SAT, SMT, and theorem provers: The listing documents deterministic SAT solving, Z3 SMT/first-order proving, and LTL model checking over caller-supplied formulas and traces.","manual_risk_type":"query_execution","remediation":{"block_tool_categories":["code_execution"],"steps":["Run only in a sandbox with least-privilege credentials and strict resource limits.","Disable generic execution gateways unless their reachable action set is fully understood.","Require approval before execution against production systems or sensitive data."]},"risk_type":"runs_code","severity":"high","title":"User-supplied logical formulas are executed by SAT, SMT, and theorem provers","triggering_tools":["fol_prove","smt_prove","ltl_check","is_satisfiable","entails","check_consistency"]}],"signature_status":"unknown","source_code_reviewed":false,"support_url":"https://reasoning.services/contact/","tags":["network_access","oauth_required","runs_code","web_connector"],"tools":[{"description":"","name":"check_consistency","risk":{"category":"code_execution","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed."}},{"description":"","name":"entails","risk":{"category":"code_execution","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed."}},{"description":"","name":"fol_prove","risk":{"category":"code_execution","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed."}},{"description":"","name":"is_satisfiable","risk":{"category":"code_execution","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed."}},{"description":"","name":"ltl_check","risk":{"category":"code_execution","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed."}},{"description":"","name":"simplify"},{"description":"","name":"smt_prove","risk":{"category":"code_execution","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can execute code, commands, queries, or dynamically selected actions. Review findings: These tools execute formal queries in a solver. Input limits and solver isolation need runtime verification even though no shell or general code execution is claimed."}},{"description":"","name":"to_cnf"},{"description":"","name":"to_dnf"}],"tools_count":9,"transport":"streamable-http","type":"web_connector","url":"https://claude.ai/directory/ebbb4cc5-e366-4893-80b8-ca491a24960c","uuid":"956acdda-5640-54c2-b94e-56ef824a31f2","verification_tier":"community","version":""},"query_key":"reasoning services formal logic","schema_version":1,"status":"match"}