# resize_pane Source: https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/ > Request pane width or height in cells. tmux may constrain the resulting size to fit its window. toolMCPlatest MCP is in development Server behavior and tool contracts may change. Tool availability depends on the server configuration. * **resize_pane**( [height](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Fheight)?: [integer](https://json-schema.org/understanding-json-schema/reference/numeric "integer (JSON Schema)"), [target](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget): [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)"), [width](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Fwidth)?: [integer](https://json-schema.org/understanding-json-schema/reference/numeric "integer (JSON Schema)"), ) tool[\[source\]](https://github.com/libtmux/libtmux-julia/blob/f3da513be1225d36d5854cd8db5972c01857578e/packages/LibTmuxMCP/src/tools.jl#L6)[ΒΆ](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane) Request pane width or height in cells. tmux may constrain the resulting size to fit its window. * MCP request method `tools/call` Send `resize_pane` as the tool name, with the arguments below. * Tool selection Opt in with `--tool resize_pane`. ## Arguments[#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.parameters) * additionalProperties `false` Matches one or more variants. * [**height**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Fheight): [integer](https://json-schema.org/understanding-json-schema/reference/numeric "integer (JSON Schema)") Optional [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Fheight) * minimum `1` * maximum `10000` * [**target**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget): [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget) Explicit captured target; omission requires a configured caller pane * additionalProperties `false` - [**generation**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget%2Fproperties%2Fgeneration): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget%2Fproperties%2Fgeneration) Opaque generation from [list_panes](https://libtmux.org/en/julia/latest/mcp/tools/list_panes/) * maxLength `128` - [**paneId**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget%2Fproperties%2FpaneId): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Ftarget%2Fproperties%2FpaneId) Valid UTF-8; at most 64 bytes * maxLength `64` * pattern `"^%(0|[1-9][0-9]*)$"` * [**width**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Fwidth): [integer](https://json-schema.org/understanding-json-schema/reference/numeric "integer (JSON Schema)") Optional [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2Fproperties%2Fwidth) * minimum `1` * maximum `10000` * [**Variant 1**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2FanyOf%2F0): any value [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2FanyOf%2F0) * [**Variant 2**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2FanyOf%2F1): any value [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.input%2FanyOf%2F1) ## Result[#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.result) Returns [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") | [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") Matches one or more variants. * [**Variant 1**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0): [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0) * additionalProperties `false` - [**completed**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Fcompleted): [boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Fcompleted) - [**generationGuarantee**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2FgenerationGuarantee): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2FgenerationGuarantee) - [**target**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Ftarget): [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Ftarget) * additionalProperties `false` - [**generation**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Ftarget%2Fproperties%2Fgeneration): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Ftarget%2Fproperties%2Fgeneration) Opaque generation from [list_panes](https://libtmux.org/en/julia/latest/mcp/tools/list_panes/) * maxLength `128` - [**paneId**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Ftarget%2Fproperties%2FpaneId): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F0%2Fproperties%2Ftarget%2Fproperties%2FpaneId) Valid UTF-8; at most 64 bytes * maxLength `64` * pattern `"^%(0|[1-9][0-9]*)$"` * [**Variant 2**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1): [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1) * [**error**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror): [object](https://json-schema.org/understanding-json-schema/reference/object "object (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror) * additionalProperties `false` - [**code**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Fcode): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Fcode) - [**effects**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Feffects): "none" | "possible" Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Feffects) - [**message**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Fmessage): [string](https://json-schema.org/understanding-json-schema/reference/string "string (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Fmessage) - [**retryable**](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Fretryable): [boolean](https://json-schema.org/understanding-json-schema/reference/boolean "boolean (JSON Schema)") Required [#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.output%2FanyOf%2F1%2Fproperties%2Ferror%2Fproperties%2Fretryable) ## Annotations[#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.annotations) * [`destructiveHint`](https://libtmux.org/en/julia/latest/mcp/reference/glossary/#destructiveHint) `true` * [`idempotentHint`](https://libtmux.org/en/julia/latest/mcp/reference/glossary/#idempotentHint) `true` * [`openWorldHint`](https://libtmux.org/en/julia/latest/mcp/reference/glossary/#openWorldHint) `true` * [`readOnlyHint`](https://libtmux.org/en/julia/latest/mcp/reference/glossary/#readOnlyHint) `false` ## Protocol data[#](https://libtmux.org/en/julia/latest/mcp/tools/resize_pane/#mcp.tool.resize_pane.schemas) Use the complete advertised contract for validation and client integration. Input schema ```json { "additionalProperties": false, "anyOf": [ { "required": [ "width" ] }, { "required": [ "height" ] } ], "properties": { "height": { "maximum": 10000, "minimum": 1, "type": "integer" }, "target": { "additionalProperties": false, "description": "Explicit captured target; omission requires a configured caller pane", "properties": { "generation": { "description": "Opaque generation from list_panes", "maxLength": 128, "type": "string" }, "paneId": { "description": "Valid UTF-8; at most 64 bytes", "maxLength": 64, "pattern": "^%(0|[1-9][0-9]*)$", "type": "string" } }, "required": [ "paneId", "generation" ], "type": "object" }, "width": { "maximum": 10000, "minimum": 1, "type": "integer" } }, "required": [ "target" ], "type": "object" } ``` Output schema ```json { "anyOf": [ { "additionalProperties": false, "properties": { "completed": { "type": "boolean" }, "generationGuarantee": { "type": "string" }, "target": { "additionalProperties": false, "properties": { "generation": { "description": "Opaque generation from list_panes", "maxLength": 128, "type": "string" }, "paneId": { "description": "Valid UTF-8; at most 64 bytes", "maxLength": 64, "pattern": "^%(0|[1-9][0-9]*)$", "type": "string" } }, "required": [ "paneId", "generation" ], "type": "object" } }, "required": [ "completed", "generationGuarantee", "target" ], "type": "object" }, { "properties": { "error": { "additionalProperties": false, "properties": { "code": { "type": "string" }, "effects": { "enum": [ "none", "possible" ] }, "message": { "type": "string" }, "retryable": { "type": "boolean" } }, "required": [ "code", "message", "effects", "retryable" ], "type": "object" } }, "required": [ "error" ], "type": "object" } ], "type": "object" } ```