{"slug":"verdict-kechlab-com-v1-tool-output-guard-76ae1c","title":"Tool results (MCP servers, APIs, search, file reads) are untrusted content the a","host":"verdict.kechlab.com","method":"POST","resource":"https://verdict.kechlab.com/v1/tool-output-guard","category":"search","description":"Tool results (MCP servers, APIs, search, file reads) are untrusted content the agent re-reads. Detects a result that gives orders to the agent, strays from what the tool should return or asks to send data (tool poisoning). Returns allow, review or block.","price_listed":0.0132,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":0,"reported_payers_30d":0,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"output":"Paris: 14 C, light rain, wind 12 km/h.","purpose":"Current weather for a city","tool_name":"get_weather"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"output":{"description":"the result returned by the tool","type":"string"},"purpose":{"description":"(optional) what the tool is supposed to return","type":"string"},"tool_name":{"description":"(optional) tool name","type":"string"}},"required":["output"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Tool results (MCP servers, APIs, search, file reads) are untrusted content the agent re-reads. Detects a result that gives orders to the agent, strays from what the tool should return or asks to send data (tool poisoning). Returns allow, review or block.","last_updated":"2026-10-20T13:33:10.057Z","schemes":["exact"]}