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

Tool inspector

stage_handoff

act imperative

Package the current work as a structured handoff and save it. Returns the link in this same call. Reply with the url field verbatim and nothing else: no preamble, no summary of what you saved, no offer to do more. If status is staged_awaiting_human_approval instead, this device has the approval gate switched on and the human must click Approve and create.

Input schema

Property	Type	Required	Description
`objective`	string	yes	The single outcome the work is aiming at.
`summary`	string	yes	Where the work actually stands right now.
`decisions`	array	no	Decisions already made, with rationale.
`constraints`	array	no	Rules the next agent must not violate.
`openQuestions`	array	no	What is still undecided.
`tasks`	array	no	Work items and their status.
`sources`	array	no	Evidence the conclusions rest on.
`handoffNote`	string	no	A direct note to whoever picks this up next.

Raw JSON schema

{
  "type": "object",
  "properties": {
    "objective": {
      "type": "string",
      "maxLength": 600,
      "description": "The single outcome the work is aiming at."
    },
    "summary": {
      "type": "string",
      "maxLength": 4000,
      "description": "Where the work actually stands right now."
    },
    "decisions": {
      "type": "array",
      "maxItems": 50,
      "items": {
        "type": "object",
        "properties": {
          "decision": {
            "type": "string",
            "maxLength": 300,
            "description": "What was decided."
          },
          "rationale": {
            "type": "string",
            "maxLength": 800,
            "description": "Why it was decided, in one or two sentences."
          }
        },
        "required": [
          "decision",
          "rationale"
        ],
        "additionalProperties": false
      },
      "description": "Decisions already made, with rationale."
    },
    "constraints": {
      "type": "array",
      "maxItems": 50,
      "items": {
        "type": "object",
        "properties": {
          "kind": {
            "type": "string",
            "enum": [
              "must",
              "must_not",
              "budget",
              "deadline",
              "legal",
              "technical"
            ],
            "description": "Constraint category."
          },
          "text": {
            "type": "string",
            "maxLength": 400,
            "description": "The constraint as the next agent must honour it."
          }
        },
        "required": [
          "kind",
          "text"
        ],
        "additionalProperties": false
      },
      "description": "Rules the next agent must not violate."
    },
    "openQuestions": {
      "type": "array",
      "maxItems": 50,
      "items": {
        "type": "string",
        "maxLength": 500,
        "description": "An unresolved question."
      },
      "description": "What is still undecided."
    },
    "tasks": {
      "type": "array",
      "maxItems": 100,
      "items": {
        "type": "object",
        "properties": {
          "title": {
            "type": "string",
            "maxLength": 300,
            "description": "Task title."
          },
          "status": {
            "type": "string",
            "enum": [
              "todo",
              "in_progress",
              "blocked",
              "done"
            ],
            "description": "Current task status."
          }
        },
        "required": [
          "title",
          "status"
        ],
        "additionalProperties": false
      },
      "description": "Work items and their status."
    },
    "sources": {
      "type": "array",
      "maxItems": 100,
      "items": {
        "type": "object",
        "properties": {
          "title": {
            "type": "string",
            "maxLength": 300,
            "description": "Source title."
          },
          "url": {
            "type": "string",
            "maxLength": 2000,
            "description": "Source URL."
          }
        },
        "required": [
          "title",
          "url"
        ],
        "additionalProperties": false
      },
      "description": "Evidence the conclusions rest on."
    },
    "handoffNote": {
      "type": "string",
      "maxLength": 2000,
      "description": "A direct note to whoever picks this up next."
    }
  },
  "required": [
    "objective",
    "summary"
  ],
  "additionalProperties": false
}

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