handback.link WebMCP Tools, Schemas & Agent Capabilities

handback.link

live Unverified (seed import) AI & Agents 5 tools imperative implementation

One link carries a session's state from your agent to someone else's. Encrypted in your browser, so the server never sees the key. Free, no account.

First seen 2026-09-07 · Last seen 2026-09-14 · Source: webmcp.com

Answer 2 · Act 3 · Transact 0 · Score: Not yet scored

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stage_contribution

act imperative

Propose a set of changes against a specific base version. Writes a new sealed version and returns it in this same call. A stale base version is refused, with the current version returned so you can re-read and re-propose. If status is staged_awaiting_human_approval instead, this device has the approval gate switched on and the human must click Approve contribution.

Input schema

Property	Type	Required	Description
`baseVersion`	integer	yes	Version this proposal was written against. Stale bases are refused.
`note`	string	yes	What this contribution adds, for the human reviewer.
`operations`	array	yes	The proposed changes.

Raw JSON schema

{
  "type": "object",
  "properties": {
    "baseVersion": {
      "type": "integer",
      "minimum": 1,
      "description": "Version this proposal was written against. Stale bases are refused."
    },
    "note": {
      "type": "string",
      "maxLength": 1000,
      "description": "What this contribution adds, for the human reviewer."
    },
    "operations": {
      "type": "array",
      "minItems": 1,
      "maxItems": 50,
      "items": {
        "type": "object",
        "properties": {
          "op": {
            "type": "string",
            "enum": [
              "set_summary",
              "add_decision",
              "add_task",
              "set_task_status",
              "add_source",
              "add_open_question"
            ],
            "description": "Which change to make."
          },
          "value": {
            "type": "string",
            "maxLength": 4000,
            "description": "The new text. For set_task_status use the task title."
          },
          "rationale": {
            "type": "string",
            "maxLength": 800,
            "description": "Why this change. Shown to the human reviewer."
          },
          "status": {
            "type": "string",
            "enum": [
              "todo",
              "in_progress",
              "blocked",
              "done"
            ],
            "description": "Required for set_task_status. Optional for add_task, where it defaults to todo. Ignored by every other op."
          },
          "url": {
            "type": "string",
            "maxLength": 2000,
            "description": "Required for add_source. Ignored by every other op."
          }
        },
        "required": [
          "op",
          "value"
        ],
        "additionalProperties": false
      },
      "description": "The proposed changes."
    }
  },
  "required": [
    "baseVersion",
    "note",
    "operations"
  ],
  "additionalProperties": false
}

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