{"id":"agent-db-schema-inspector","card_id":"card_agent_db_schema_inspector","name":"Agent DB schema inspector","description":"Inspects supplied table/column/index metadata for common schema risks before an AI proposes migrations.","stage":1,"safety_level":"data_only_read_only","auth":{"type":"hmac-sha256","required_headers":["x-apex-tool-timestamp","x-apex-tool-nonce","x-apex-tool-content-sha256","x-apex-tool-signature"],"canonical_payload":"APEX-TOOL-V1\\n{tool_id}\\n{timestamp}\\n{nonce}\\n{sha256(canonical_json(body))}"},"input_schema":{"type":"object","properties":{"tables":{"type":"array"}}},"output_schema":{"type":"object","properties":{"decision":{"type":"string"},"issues":{"type":"array"}}},"sample_input":{"tables":[{"name":"events","columns":[{"name":"id","type":"uuid","primary_key":true},{"name":"user_id","type":"text"}]}]}}