ReMCP

Computer Toggle

computer_toggle

Destructive

Use this to change the state of a native checkbox, switch or toggle identified through the current desktop snapshot. Check its current state to avoid unintended changes; toggles can alter application settings.

Input Schema

Name	Required	Description
`x`	No	Virtual-desktop X coordinate used by click/scroll coordinate targeting.
`y`	No	Virtual-desktop Y coordinate used by click/scroll coordinate targeting.
`id`	No	Element id returned by ui_snapshot or ui_find. Linux ids are stable per-process accessibility paths and legacy linux:<index> ids remain accepted.
`app`	No	Limit matching to an application/process name substring when available.
`pid`	No	Limit matching to one owning process id when available.
`name`	No	Accessible name/title substring.
`role`	No	Accessible role such as Button, Edit, textbox or AXButton.
`label`	No	Compact numeric label from the most recent ui_snapshot/ui_find; useful for repeated actions without repeating names or coordinates.
`title`	No	Optional browser page title substring or top-level window title when target=window.
`device`	Yes	ReMCP device id returned by list_devices. Required for every device operation.
`target`	No	Optional target type. auto prefers native accessibility, then browser DOM/CDP, then OCR/coordinates where supported. Use window for explicit top-level window focus/text/scroll targeting.
`ocr_text`	No	Visible text to find in rendered pixels for the OCR click fallback.
`selector`	No	CSS selector when the fallback target is a browser element.
`window_id`	No	Top-level window id returned by list_windows when target=window.
`browser_text`	No	Visible browser text used only to locate a DOM target; for action=type, text remains the value to enter.
`window_title`	No	Limit matching to a top-level accessibility window/frame title substring when available.
`automation_id`	No	Windows AutomationId when available.

Output Schema

Name	Required	Description	Default
`data`	No	Computer action structured result for computer_action. Stable fields are declared explicitly; platform-specific fields may be added. Large results may return truncated/bytes/preview instead of the full payload.
`text`	Yes	Concise human-readable result of the tool call.

Schema Changelog

Changes observed during successful MCP inspections.

AddedOct 19, 2026

TDQS

A3.8/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already flag destructiveHint=true and idempotentHint=false, so the safety profile is known. The description adds real value on top: toggles "can alter application settings" and the state should be verified first, which tells the agent this is a state-flipping mutation with side effects. It stops short of noting that repeated invocations flip the value back or what failure looks like when the target is not a toggle.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two compact sentences, zero filler, with the core action stated first and the caution second. Nothing is repeated from the title or the schema.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be explained, and the 17 parameters are fully documented in schema. The description covers the snapshot dependency and the mutation risk; what it leaves out is behavior when the element is not actually a toggle.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

All 17 parameters carry schema descriptions (100% coverage), so the schema does the heavy lifting and baseline 3 applies. The description only hints at the snapshot/identification path and adds no syntax, defaults, or precedence rules for target selection among the many locator parameters.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States specific verb and resource: "change the state of a native checkbox, switch or toggle", plus the identifying mechanism (current desktop snapshot). It is clear what the tool does, but it never distinguishes itself from the near-identical sibling ui_toggle, leaving the agent to guess which one applies.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

"Check its current state to avoid unintended changes" gives a usable precondition, and the reference to the current desktop snapshot implies a prior snapshot call. However, no alternative tool is named (ui_toggle, computer_click, computer_set_value) and there is no when-not guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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