{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:XKUJSJFFWDYLPYPZHYCSYCCGVS","short_pith_number":"pith:XKUJSJFF","canonical_record":{"source":{"id":"2606.05339","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2026-06-03T18:28:20Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"be3ad082c132566ced16ded74fd5464a71d26e22434f4c9cb749c3504ba5c82d","abstract_canon_sha256":"e35bb89ce348590daee227a2f77f85f256f5bcc05abbb6e78aa66b5cf6801ecd"},"schema_version":"1.0"},"canonical_sha256":"baa89924a5b0f0b7e1f93e052c0846ac92768c9aeb059e53783f545bff06ade0","source":{"kind":"arxiv","id":"2606.05339","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.05339","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"arxiv_version","alias_value":"2606.05339v1","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.05339","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"pith_short_12","alias_value":"XKUJSJFFWDYL","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"pith_short_16","alias_value":"XKUJSJFFWDYLPYPZ","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"pith_short_8","alias_value":"XKUJSJFF","created_at":"2026-06-05T00:13:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:XKUJSJFFWDYLPYPZHYCSYCCGVS","target":"record","payload":{"canonical_record":{"source":{"id":"2606.05339","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2026-06-03T18:28:20Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"be3ad082c132566ced16ded74fd5464a71d26e22434f4c9cb749c3504ba5c82d","abstract_canon_sha256":"e35bb89ce348590daee227a2f77f85f256f5bcc05abbb6e78aa66b5cf6801ecd"},"schema_version":"1.0"},"canonical_sha256":"baa89924a5b0f0b7e1f93e052c0846ac92768c9aeb059e53783f545bff06ade0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-05T00:13:54.703613Z","signature_b64":"EXCHVbqrNV1HCKyLjHUbYqi83yh6LY7Gr5cXOgBMp2ENbD1wMELXYsLPhgYfAjsDUya6fL8SqF0hHyKKzp8MCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"baa89924a5b0f0b7e1f93e052c0846ac92768c9aeb059e53783f545bff06ade0","last_reissued_at":"2026-06-05T00:13:54.703178Z","signature_status":"signed_v1","first_computed_at":"2026-06-05T00:13:54.703178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.05339","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-05T00:13:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KswOaiMDtVq0XQlRGSRvCotAqj05VEL5JLyklEjHByI+uCmSzj7vAOQ8hXuelxlMLcR2tU1s5oF8yFhsURk6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:07:18.156752Z"},"content_sha256":"b8353208d347905afd885361e23a9409a4b25ffaaf07c9007eb98fa98c781894","schema_version":"1.0","event_id":"sha256:b8353208d347905afd885361e23a9409a4b25ffaaf07c9007eb98fa98c781894"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:XKUJSJFFWDYLPYPZHYCSYCCGVS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Taxonomy of Runtime Faults in Model Context Protocol Servers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.SE","authors_text":"Antonio Ken Iannillo, Damian Andrew Tamburri, Indika Kumara, Joshua Owotogbe, Roberto Natella, Willem-Jan van den Heuvel","submitted_at":"2026-06-03T18:28:20Z","abstract_excerpt":"MCP (Model Context Protocol) enables LLMs (Large Language Models) to interact with external tools and data sources via a standardized protocol. Its rapid adoption in tool-augmented Artificial Intelligence (AI) workflows has introduced new reliability challenges, such as configuration parameters that are accepted but not enforced at runtime, leading to unintended default behavior, whose runtime fault characteristics remain empirically unexamined. We present the first empirical taxonomy of runtime faults in MCP servers. We manually analyzed 837 MCP-specific runtime fault threads from 473 activel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.05339","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.05339/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-05T00:13:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KoD5TOvQya778VtvdDCtnnZzDM+79nbozZTNNpyR8Krh5YlFswtTD7ETLVdeBtxGY56mFdlpxMJCjcYix0uLDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:07:18.157138Z"},"content_sha256":"e2c665a58ff5e1ffecb3ddf89f6d537b1aba5d63ab88d9d67e8dcb2f711e52a8","schema_version":"1.0","event_id":"sha256:e2c665a58ff5e1ffecb3ddf89f6d537b1aba5d63ab88d9d67e8dcb2f711e52a8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS/bundle.json","state_url":"https://pith.science/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-11T14:07:18Z","links":{"resolver":"https://pith.science/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS","bundle":"https://pith.science/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS/bundle.json","state":"https://pith.science/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XKUJSJFFWDYLPYPZHYCSYCCGVS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:XKUJSJFFWDYLPYPZHYCSYCCGVS","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e35bb89ce348590daee227a2f77f85f256f5bcc05abbb6e78aa66b5cf6801ecd","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2026-06-03T18:28:20Z","title_canon_sha256":"be3ad082c132566ced16ded74fd5464a71d26e22434f4c9cb749c3504ba5c82d"},"schema_version":"1.0","source":{"id":"2606.05339","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.05339","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"arxiv_version","alias_value":"2606.05339v1","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.05339","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"pith_short_12","alias_value":"XKUJSJFFWDYL","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"pith_short_16","alias_value":"XKUJSJFFWDYLPYPZ","created_at":"2026-06-05T00:13:54Z"},{"alias_kind":"pith_short_8","alias_value":"XKUJSJFF","created_at":"2026-06-05T00:13:54Z"}],"graph_snapshots":[{"event_id":"sha256:e2c665a58ff5e1ffecb3ddf89f6d537b1aba5d63ab88d9d67e8dcb2f711e52a8","target":"graph","created_at":"2026-06-05T00:13:54Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.05339/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"MCP (Model Context Protocol) enables LLMs (Large Language Models) to interact with external tools and data sources via a standardized protocol. Its rapid adoption in tool-augmented Artificial Intelligence (AI) workflows has introduced new reliability challenges, such as configuration parameters that are accepted but not enforced at runtime, leading to unintended default behavior, whose runtime fault characteristics remain empirically unexamined. We present the first empirical taxonomy of runtime faults in MCP servers. We manually analyzed 837 MCP-specific runtime fault threads from 473 activel","authors_text":"Antonio Ken Iannillo, Damian Andrew Tamburri, Indika Kumara, Joshua Owotogbe, Roberto Natella, Willem-Jan van den Heuvel","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2026-06-03T18:28:20Z","title":"A Taxonomy of Runtime Faults in Model Context Protocol Servers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.05339","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:b8353208d347905afd885361e23a9409a4b25ffaaf07c9007eb98fa98c781894","target":"record","created_at":"2026-06-05T00:13:54Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e35bb89ce348590daee227a2f77f85f256f5bcc05abbb6e78aa66b5cf6801ecd","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2026-06-03T18:28:20Z","title_canon_sha256":"be3ad082c132566ced16ded74fd5464a71d26e22434f4c9cb749c3504ba5c82d"},"schema_version":"1.0","source":{"id":"2606.05339","kind":"arxiv","version":1}},"canonical_sha256":"baa89924a5b0f0b7e1f93e052c0846ac92768c9aeb059e53783f545bff06ade0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"baa89924a5b0f0b7e1f93e052c0846ac92768c9aeb059e53783f545bff06ade0","first_computed_at":"2026-06-05T00:13:54.703178Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-05T00:13:54.703178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EXCHVbqrNV1HCKyLjHUbYqi83yh6LY7Gr5cXOgBMp2ENbD1wMELXYsLPhgYfAjsDUya6fL8SqF0hHyKKzp8MCA==","signature_status":"signed_v1","signed_at":"2026-06-05T00:13:54.703613Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.05339","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8353208d347905afd885361e23a9409a4b25ffaaf07c9007eb98fa98c781894","sha256:e2c665a58ff5e1ffecb3ddf89f6d537b1aba5d63ab88d9d67e8dcb2f711e52a8"],"state_sha256":"42430ae6ccc4f44e47fc983d33d1dc5648be137df3268c86a2779a2512529e14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rbcG+l79sR9W2euzVFLxlduGnW/PUdTaqoFlzfEbEJRWHm+L4/IUnXOxtGEHE++csgojNFh9txS9XVuNFp8WDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T14:07:18.159505Z","bundle_sha256":"60dc61c26da041d0df58c78e95514421bd2d0f3b575bc177a3705e5ae0c23fef"}}