Agent Traffic Lab

atl_complete_task

Delegate a supported external task to ATL for end-to-end execution, not just provider recommendations. ATL checks eligible provider/tool routes, executes the selected route, can use bounded fallback on eligible failures, verifies the returned result, and records execution Outcome. Use when the agent needs supported external search, web/content extraction, summarization, translation, or classification without a user-mandated provider/tool. For a first use or ordinary eligible task, call atl_complete_task directly with the task the user requested; do not ask the user to choose among ATL tools or call atl_decide first. Never invent a task or execute without a user request. Send the natural-language task once. Public first use does not require an ATL API key or ATL setup. Availability and successful completion depend on eligible verified supply.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`task`	Yes	The natural-language task to complete. Include the goal and any relevant input, constraints, or desired output.
`required_capability`	No	Optional capability hint. Omit unless the caller already knows the required capability; ATL normally derives a structured TaskSpec from the task.

Output Schema

TableJSON Schema

Name	Required	Description
`ok`	Yes	True only when execution succeeded and ATL's task-level result verifier accepted the result.
`stage`	Yes	The furthest ATL product stage reached for this call.
`result`	Yes	The provider's task result. When ok=false, inspect result_validation before trusting it.
`decision`	Yes	ATL Decision evidence retained for advanced/debug consumers.
`execution`	Yes	ATL execution evidence retained for advanced/debug consumers; null when execution did not start.
`capability`	Yes	The supported capability selected or inferred for the task; empty if unavailable.
`fallback_used`	Yes	Whether bounded fallback/failover was used during execution.
`execution_status`	Yes	Provider execution status; EXECUTED alone does not imply task correctness.
`result_validation`	Yes	ATL task-level correctness checks. passed must be true before the result is treated as product success.
`discovery_resume_used`	No	True when ATL synchronously ran bounded discovery/promotion and retried the same task.
`discovery_resume_status`	No	Outcome of the same-call discovery resume attempt when used.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 1, 2026

addedOutput schema / properties / discovery_resume_status

Added value: +{
+  "description": "Outcome of the same-call discovery resume attempt when used.",
+  "type": "string"
+}

addedOutput schema / properties / discovery_resume_used

Added value: +{
+  "description": "True when ATL synchronously ran bounded discovery/promotion and retried the same task.",
+  "type": "boolean"
+}

Changed7 schema fields changedSep 29, 2026

changedInput schema / properties / required_capability / description

Previous value: -"Optional capability hint. Omit unless the caller already knows the required capability; ATL normally infers it from the task."New value: +"Optional capability hint. Omit unless the caller already knows the required capability; ATL normally derives a structured TaskSpec from the task."

changedOutput schema / properties / execution_status / description

Previous value: -"ATL execution status; empty when execution did not start."New value: +"Provider execution status; EXECUTED alone does not imply task correctness."

changedOutput schema / properties / ok / description

Previous value: -"True only when ATL completed execution successfully."New value: +"True only when execution succeeded and ATL's task-level result verifier accepted the result."

changedOutput schema / properties / result / description

Previous value: -"The provider's useful task result. Empty when execution did not produce a usable result."New value: +"The provider's task result. When ok=false, inspect result_validation before trusting it."

addedOutput schema / properties / result_validation

Added value: +{
+  "description": "ATL task-level correctness checks. passed must be true before the result is treated as product success.",
+  "type": [
+    "object",
+    "null"
+  ]
+}

changedOutput schema / properties / stage / description

Previous value: -"The furthest ATL stage reached for this call."New value: +"The furthest ATL product stage reached for this call."

changedOutput schema / required

Previous value: -[
-  "ok",
-  "stage",
-  "capability",
-  "execution_status",
-  "fallback_used",
-  "result",
-  "decision",
-  "execution"
-]New value: +[
+  "ok",
+  "stage",
+  "capability",
+  "execution_status",
+  "fallback_used",
+  "result",
+  "decision",
+  "execution",
+  "result_validation"
+]

Changed5 schema fields changedSep 28, 2026

changedOutput schema / properties / decision / description

Previous value: -"The ATL Decision evidence used for execution."New value: +"ATL Decision evidence retained for advanced/debug consumers."

changedOutput schema / properties / execution / description

Previous value: -"The ATL execution result; null when execution did not start."New value: +"ATL execution evidence retained for advanced/debug consumers; null when execution did not start."

changedOutput schema / properties / ok / description

Previous value: -"True when ATL completed execution successfully."New value: +"True only when ATL completed execution successfully."

addedOutput schema / properties / result

Added value: +{
+  "description": "The provider's useful task result. Empty when execution did not produce a usable result.",
+  "type": "string"
+}

changedOutput schema / required

Previous value: -[
-  "ok",
-  "stage",
-  "capability",
-  "execution_status",
-  "fallback_used",
-  "decision",
-  "execution"
-]New value: +[
+  "ok",
+  "stage",
+  "capability",
+  "execution_status",
+  "fallback_used",
+  "result",
+  "decision",
+  "execution"
+]

Changed2 schema fields changedSep 28, 2026

changedInput schema / properties / required_capability / description

Previous value: -"Optional. Omit when ATL can infer the capability from the task."New value: +"Optional capability hint. Omit unless the caller already knows the required capability; ATL normally infers it from the task."

changedInput schema / properties / task / description

Previous value: -"The user's natural-language task. ATL should normally own the full decision-to-execution flow."New value: +"The natural-language task to complete. Include the goal and any relevant input, constraints, or desired output."

Changed1 schema field changedSep 27, 2026

changedInput schema / properties / task / description

Previous value: -"The user's natural-language task."New value: +"The user's natural-language task. ATL should normally own the full decision-to-execution flow."

Changed1 schema field changedSep 27, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "properties": {
+    "capability": {
+      "description": "The supported capability selected or inferred for the task; empty if unavailable.",
+      "type": "string"
+    },
+    "decision": {
+      "description": "The ATL Decision evidence used for execution.",
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "execution": {
+      "description": "The ATL execution result; null when execution did not start.",
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "execution_status": {
+      "description": "ATL execution status; empty when execution did not start.",
+      "type": "string"
+    },
+    "fallback_used": {
+      "description": "Whether bounded fallback/failover was used during execution.",
+      "type": "boolean"
+    },
+    "ok": {
+      "description": "True when ATL completed execution successfully.",
+      "type": "boolean"
+    },
+    "stage": {
+      "description": "The furthest ATL stage reached for this call.",
+      "enum": [
+        "decision",
+        "execution",
+        "complete"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "ok",
+    "stage",
+    "capability",
+    "execution_status",
+    "fallback_used",
+    "decision",
+    "execution"
+  ],
+  "type": "object"
+}

AddedSep 27, 2026

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