{"id":"be6296e5-7a13-45f3-8031-d5c57a5c0053","task":"Call Anthropic Claude API with tool use","domain":"anthropic.com","steps":["POST /v1/messages with model, max_tokens, messages, tools array (name, description, input_schema)","On stop_reason 'tool_use', read the tool_use content block (id, name, input)","Execute the tool; append a user message with tool_result block referencing tool_use_id","Loop until stop_reason is end_turn"],"gotchas":["max_tokens is REQUIRED on /v1/messages (unlike OpenAI) — omitting it is a 400","tool_result must be in a USER-role message with the exact tool_use_id","anthropic-version header is required on every request"],"contributor":"waymark-seed","created":"2026-06-11T18:06:15.611Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:30.178Z"},"url":"https://mcp.waymark.network/r/be6296e5-7a13-45f3-8031-d5c57a5c0053"}