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Continue a Harness session

reply_run
Destructive

Submit a new queued turn to a completed run session, optionally selecting a different model, and track it as a new run.

Instructions

Submit a new queued turn to the completed run session, optionally selecting a different model, and track it as a new run. Task parameters are path-reference-only: provide the authorized workspace, reviewTargets, contextReadScope, excludedPaths, writeScope, and acceptance criteria. reviewTargets identify what to assess; they are not a read whitelist. contextReadScope declares where Harness may search and read supporting implementation, tests, configuration, and architecture material. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. These fields are task instructions, not enforced per-path filesystem isolation. The selected Harness model may send content it reads to its configured model provider even though Relay itself uses a loopback address.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
taskNoTask parameters are path-reference-only: provide the authorized workspace, reviewTargets, contextReadScope, excludedPaths, writeScope, and acceptance criteria. reviewTargets identify what to assess; they are not a read whitelist. contextReadScope declares where Harness may search and read supporting implementation, tests, configuration, and architecture material. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. These fields are task instructions, not enforced per-path filesystem isolation. The selected Harness model may send content it reads to its configured model provider even though Relay itself uses a loopback address.
modelNo
runIdYes
contentNoTask parameters are path-reference-only: provide the authorized workspace, reviewTargets, contextReadScope, excludedPaths, writeScope, and acceptance criteria. reviewTargets identify what to assess; they are not a read whitelist. contextReadScope declares where Harness may search and read supporting implementation, tests, configuration, and architecture material. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. These fields are task instructions, not enforced per-path filesystem isolation. The selected Harness model may send content it reads to its configured model provider even though Relay itself uses a loopback address.
providerNo
writeScopeNoPaths Harness may modify. Must be empty for read-only runs; this is an instruction declaration in addition to native permissions.
openBrowserNoKeep false unless the user explicitly asks to open the Harness page in the OS browser.
excludedPathsNoPaths excluded from contextual reading. This is an instruction declaration, not filesystem enforcement.
reviewTargetsNoSubjects to assess. This is not a read whitelist; supply together with contextReadScope.
idempotencyKeyNo
reasoningEffortNo
contextReadScopeNoWorkspace paths Harness may search and read for evidence. Use only the targets when the user explicitly requests a target-only review.
permissionPresetNo
authorizationBasisNoTruthful evidence that the user explicitly selected Harness to inspect this workspace. Set only when the current conversation contains that instruction. This records evidence and does not expand permissions or guarantee approval.
confirmedDangerousPermissionNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed9 schema fields changedv0.2.13
    • addedInput schema / properties / authorizationBasis
      Added value: +{
      +  "const": "explicit-user-request",
      +  "description": "Truthful evidence that the user explicitly selected Harness to inspect this workspace. Set only when the current conversation contains that instruction. This records evidence and does not expand permissions or guarantee approval.",
      +  "type": "string"
      +}
    • changedInput schema / properties / content / description
      Previous value: -"Task parameters are path-reference-only: provide the authorized workspace, file or directory locations, scope, and acceptance criteria. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. This rule is identical for read-only and write-capable permissions."New value: +"Task parameters are path-reference-only: provide the authorized workspace, reviewTargets, contextReadScope, excludedPaths, writeScope, and acceptance criteria. reviewTargets identify what to assess; they are not a read whitelist. contextReadScope declares where Harness may search and read supporting implementation, tests, configuration, and architecture material. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. These fields are task instructions, not enforced per-path filesystem isolation. The selected Harness model may send content it reads to its configured model provider even though Relay itself uses a loopback address."
    • changedInput schema / properties / content / items / oneOf
      Previous value: -[
      -  {
      -    "properties": {
      -      "text": {
      -        "description": "Task parameters are path-reference-only: provide the authorized workspace, file or directory locations, scope, and acceptance criteria. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. This rule is identical for read-only and write-capable permissions.",
      -        "maxLength": 100000,
      -        "type": "string"
      -      },
      -      "type": {
      -        "const": "text",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "type",
      -      "text"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "properties": {
      -      "data": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "mediaType": {
      -        "enum": [
      -          "image/png",
      -          "image/jpeg",
      -          "image/webp",
      -          "image/gif"
      -        ],
      -        "type": "string"
      -      },
      -      "name": {
      -        "type": "string"
      -      },
      -      "type": {
      -        "const": "image",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "type",
      -      "mediaType",
      -      "data"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "properties": {
      +      "text": {
      +        "description": "Task parameters are path-reference-only: provide the authorized workspace, reviewTargets, contextReadScope, excludedPaths, writeScope, and acceptance criteria. reviewTargets identify what to assess; they are not a read whitelist. contextReadScope declares where Harness may search and read supporting implementation, tests, configuration, and architecture material. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. These fields are task instructions, not enforced per-path filesystem isolation. The selected Harness model may send content it reads to its configured model provider even though Relay itself uses a loopback address.",
      +        "maxLength": 100000,
      +        "type": "string"
      +      },
      +      "type": {
      +        "const": "text",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "type",
      +      "text"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "properties": {
      +      "data": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "mediaType": {
      +        "enum": [
      +          "image/png",
      +          "image/jpeg",
      +          "image/webp",
      +          "image/gif"
      +        ],
      +        "type": "string"
      +      },
      +      "name": {
      +        "type": "string"
      +      },
      +      "type": {
      +        "const": "image",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "type",
      +      "mediaType",
      +      "data"
      +    ],
      +    "type": "object"
      +  }
      +]
    • addedInput schema / properties / contextReadScope
      Added value: +{
      +  "description": "Workspace paths Harness may search and read for evidence. Use only the targets when the user explicitly requests a target-only review.",
      +  "items": {
      +    "description": "Workspace-relative path, or an absolute path contained by the authorized workspace.",
      +    "minLength": 1,
      +    "type": "string"
      +  },
      +  "minItems": 1,
      +  "type": "array"
      +}
    • addedInput schema / properties / excludedPaths
      Added value: +{
      +  "description": "Paths excluded from contextual reading. This is an instruction declaration, not filesystem enforcement.",
      +  "items": {
      +    "description": "Workspace-relative path, or an absolute path contained by the authorized workspace.",
      +    "minLength": 1,
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
    • addedInput schema / properties / openBrowser / description
      Added value: +"Keep false unless the user explicitly asks to open the Harness page in the OS browser."
    • addedInput schema / properties / reviewTargets
      Added value: +{
      +  "description": "Subjects to assess. This is not a read whitelist; supply together with contextReadScope.",
      +  "items": {
      +    "description": "Workspace-relative path, or an absolute path contained by the authorized workspace.",
      +    "minLength": 1,
      +    "type": "string"
      +  },
      +  "minItems": 1,
      +  "type": "array"
      +}
    • changedInput schema / properties / task / description
      Previous value: -"Task parameters are path-reference-only: provide the authorized workspace, file or directory locations, scope, and acceptance criteria. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. This rule is identical for read-only and write-capable permissions."New value: +"Task parameters are path-reference-only: provide the authorized workspace, reviewTargets, contextReadScope, excludedPaths, writeScope, and acceptance criteria. reviewTargets identify what to assess; they are not a read whitelist. contextReadScope declares where Harness may search and read supporting implementation, tests, configuration, and architecture material. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. These fields are task instructions, not enforced per-path filesystem isolation. The selected Harness model may send content it reads to its configured model provider even though Relay itself uses a loopback address."
    • addedInput schema / properties / writeScope
      Added value: +{
      +  "description": "Paths Harness may modify. Must be empty for read-only runs; this is an instruction declaration in addition to native permissions.",
      +  "items": {
      +    "description": "Workspace-relative path, or an absolute path contained by the authorized workspace.",
      +    "minLength": 1,
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
  2. Changed3 schema fields changedv0.2.9
    • addedInput schema / properties / content / description
      Added value: +"Task parameters are path-reference-only: provide the authorized workspace, file or directory locations, scope, and acceptance criteria. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. This rule is identical for read-only and write-capable permissions."
    • changedInput schema / properties / content / items / oneOf
      Previous value: -[
      -  {
      -    "properties": {
      -      "text": {
      -        "maxLength": 100000,
      -        "type": "string"
      -      },
      -      "type": {
      -        "const": "text",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "type",
      -      "text"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "properties": {
      -      "data": {
      -        "minLength": 1,
      -        "type": "string"
      -      },
      -      "mediaType": {
      -        "enum": [
      -          "image/png",
      -          "image/jpeg",
      -          "image/webp",
      -          "image/gif"
      -        ],
      -        "type": "string"
      -      },
      -      "name": {
      -        "type": "string"
      -      },
      -      "type": {
      -        "const": "image",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "type",
      -      "mediaType",
      -      "data"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "properties": {
      +      "text": {
      +        "description": "Task parameters are path-reference-only: provide the authorized workspace, file or directory locations, scope, and acceptance criteria. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. This rule is identical for read-only and write-capable permissions.",
      +        "maxLength": 100000,
      +        "type": "string"
      +      },
      +      "type": {
      +        "const": "text",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "type",
      +      "text"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "properties": {
      +      "data": {
      +        "minLength": 1,
      +        "type": "string"
      +      },
      +      "mediaType": {
      +        "enum": [
      +          "image/png",
      +          "image/jpeg",
      +          "image/webp",
      +          "image/gif"
      +        ],
      +        "type": "string"
      +      },
      +      "name": {
      +        "type": "string"
      +      },
      +      "type": {
      +        "const": "image",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "type",
      +      "mediaType",
      +      "data"
      +    ],
      +    "type": "object"
      +  }
      +]
    • addedInput schema / properties / task / description
      Added value: +"Task parameters are path-reference-only: provide the authorized workspace, file or directory locations, scope, and acceptance criteria. Never embed source text, diffs, file dumps, encoded source, or repository archives. Harness reads named files from the authorized workspace itself. This rule is identical for read-only and write-capable permissions."
  3. First observedv0.2.6

TDQS

A3.8/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already indicate a non-read-only, destructive, open-world operation, but the description adds valuable behavioral context: it discloses that the selected model may send content to its provider, clarifies that path fields are 'instructions, not enforced per-path filesystem isolation,' and notes that the run is tracked as a new run. This goes beyond the annotations and helps set expectations for side effects.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is relatively long but each sentence carries important information: the primary action in the first sentence, then critical usage constraints and a privacy note. It is front-loaded and structured logically, though it could be tightened by merging related points. The verbosity is justified by the complexity of the tool's requirements.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With 15 parameters and no output schema, the description covers the core purpose and a few critical constraints, but it omits guidance on many parameters (e.g., model, provider, permissionPreset, confirmedDangerousPermission). While the schema provides some descriptions, the tool is complex enough that an agent would need more explicit guidance on how to set these fields and interpret the result. The description is not fully complete for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 53%, so the description must add meaning. It does explain key fields like reviewTargets ('not a read whitelist') and contextReadScope, adding semantic clarity. However, many parameters (model, provider, permissionPreset, idempotencyKey, reasoningEffort, etc.) are not mentioned in the description, leaving gaps that the schema only partially fills. The description helps but does not fully compensate for the lower schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a precise action: 'Submit a new queued turn to the completed run session, optionally selecting a different model, and track it as a new run.' This combines a specific verb, resource, and outcome, clearly distinguishing it from siblings like start_run or steer_run by emphasizing continuation of a completed session and creation of a new run record.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description indicates the tool is for continuing a completed run session, which implies when to use it, but it does not explicitly mention alternatives or conditions when this tool should not be used. It provides extensive instructions on how to structure task parameters, which is useful, but lacks explicit 'use X instead' guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.