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webmcp-key-tests.netlify.app

Developer ToolsTools verifiedOct 26, 2026

Why the id that keeps React's DOM in sync with your data is the same identity a WebMCP agent needs to edit that data safely, measured against Chrome's native document.modelContext.

list-itemsAnswer

List every item on the packing list in display order. Each entry has a stable `id` (use it to refer to the item in other tools) and its current `index` (changes whenever the list changes).

View tool JSON

{
  "name": "list-items",
  "kind": "answer",
  "impl": "imperative",
  "description": "List every item on the packing list in display order. Each entry has a stable `id` (use it to refer to the item in other tools) and its current `index` (changes whenever the list changes).",
  "inputSchema": {
    "type": "object",
    "properties": {}
  }
}

add-itemAction

Add an item to the packing list and return its new id.

View tool JSON

{
  "name": "add-item",
  "kind": "act",
  "impl": "imperative",
  "description": "Add an item to the packing list and return its new id.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "text": {
        "type": "string",
        "description": "What to pack, e.g. 'Bear spray'."
      },
      "position": {
        "type": "string",
        "enum": [
          "top",
          "bottom"
        ],
        "description": "Where to insert it. Defaults to bottom."
      }
    },
    "required": [
      "text"
    ]
  }
}

remove-itemAction

Remove an item from the packing list by id.

View tool JSON

{
  "name": "remove-item",
  "kind": "act",
  "impl": "imperative",
  "description": "Remove an item from the packing list by id.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "id": {
        "type": "number",
        "description": "The item's id, as returned by list-items or add-item."
      }
    },
    "required": [
      "id"
    ]
  }
}

move-itemAction

Move an item to a new position in the list.

View tool JSON

{
  "name": "move-item",
  "kind": "act",
  "impl": "imperative",
  "description": "Move an item to a new position in the list.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "id": {
        "type": "number",
        "description": "The item's id, as returned by list-items or add-item."
      },
      "index": {
        "type": "number",
        "description": "Zero-based position to move the item to. 0 is the top."
      }
    },
    "required": [
      "id",
      "index"
    ]
  }
}

rename-itemAction

Change an item's text. The item keeps its id.

View tool JSON

{
  "name": "rename-item",
  "kind": "act",
  "impl": "imperative",
  "description": "Change an item's text. The item keeps its id.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "id": {
        "type": "number",
        "description": "The item's id, as returned by list-items or add-item."
      },
      "text": {
        "type": "string",
        "description": "The new text."
      }
    },
    "required": [
      "id",
      "text"
    ]
  }
}