# list_windows

Source: https://libtmux.org/en/py/latest/mcp/tools/list_windows/

> List tmux windows (terminal tabs) in a session, or across the server.

MCP is in development

Server behavior and tool contracts may change. Tool availability depends on the server configuration.

List tmux windows (terminal tabs) in a session, or across the server.

Use for tmux windows — ‘current window’, ‘this tab’ (when terminal- contextual) — not browser tabs or desktop windows. Only searches window metadata (name, index, layout); to search the actual visible terminal text, use [search_panes](https://libtmux.org/en/py/latest/mcp/tools/search_panes/).

[All Python tools](https://libtmux.org/en/py/latest/mcp/tools/) · [JSON](https://libtmux.org/en/py/latest/mcp/tools/list_windows.json) · [Source](https://github.com/tmux-python/libtmux-mcp/blob/4daddc0dfca96c43bf521d818bf91564e1434760/src/libtmux_mcp/tools/session_tools.py#L353)

## Arguments

* `filters` optional

  Django-style filters as a dict (e.g. \`\`{"window_name__contains": "dev"}\`\`) or as a JSON string. Some MCP clients require the string form.

  Default: `null`.

* `session_id` optional

  Session ID (e.g. '$1') to look up.

  Default: `null`.

* `session_name` optional

  Session name to look up. If omitted along with session_id, returns windows from all sessions.

  Default: `null`.

* `socket_name` optional

  tmux socket name. Defaults to LIBTMUX_SOCKET env var.

  Default: `null`.

## Schemas

The schema defines required fields, nested values, defaults, and validation constraints.

Input schema

```json
{
  "additionalProperties": false,
  "properties": {
    "filters": {
      "anyOf": [
        {
          "additionalProperties": {
            "type": "string"
          },
          "type": "object"
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Django-style filters as a dict (e.g. ``{\"window_name__contains\": \"dev\"}``)\nor as a JSON string. Some MCP clients require the string form."
    },
    "session_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Session ID (e.g. '$1') to look up."
    },
    "session_name": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Session name to look up. If omitted along with session_id,\nreturns windows from all sessions."
    },
    "socket_name": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "tmux socket name. Defaults to LIBTMUX_SOCKET env var."
    }
  },
  "type": "object"
}
```

Output schema

```json
{
  "properties": {
    "result": {
      "items": {
        "description": "Serialized tmux window.",
        "properties": {
          "active_pane_id": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Pane id (``%N``) of the window's active pane."
          },
          "pane_count": {
            "description": "Number of panes",
            "type": "integer"
          },
          "session_id": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Parent session ID"
          },
          "session_name": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Parent session name"
          },
          "window_active": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Active flag ('1' or '0')"
          },
          "window_height": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Height in rows"
          },
          "window_id": {
            "description": "Window ID (e.g. '@1')",
            "type": "string"
          },
          "window_index": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Window index"
          },
          "window_layout": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Layout string"
          },
          "window_name": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Window name"
          },
          "window_width": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Width in columns"
          }
        },
        "required": [
          "window_id",
          "pane_count"
        ],
        "type": "object"
      },
      "type": "array"
    }
  },
  "required": [
    "result"
  ],
  "type": "object",
  "x-fastmcp-wrap-result": true
}
```

Tool annotations

```json
{
  "destructiveHint": true,
  "idempotentHint": false,
  "openWorldHint": true,
  "readOnlyHint": false
}
```