CursorMove action, Move the text cursor (caret) left or right within an input field or text area. Use this to reposition the cursor without selecting text.. Parameters: direction (enum('left', 'right')) - The direction to move the cursor; times? (number) - The number of times to move the cursor i...
AI agents invoke CursorMove to trigger actions in Web Bridge. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
times | integer | — | The number of times to move the cursor in the specified direction |
web.url | string | — | URL to open in new tab (omit to use current page) |
direction | string | Yes | The direction to move the cursor |
web.aiActContext | string | — | Background knowledge passed to aiAct. Default: no extra context. |
web.waitAfterAction | number | — | Wait time in milliseconds after each action execution. Default: 300ms. |
web.replanningCycleLimit | integer | — | Maximum number of replanning cycles for aiAct. Default: model adapter default. |
web.screenshotShrinkFactor | number | — | Screenshot shrink factor before sending images to AI. Default: 1; high values may reduce recognition quality, especially on mobile. |
Parameters from the server's own tool schema.
CursorMove performs a browser automation action (moving the text cursor) that affects the state of a UI element. It is not purely reading data, nor writing/deleting content, but executing an interactive browser operation. Severity is low because it only repositions the cursor without selecting, modifying, or deleting text, and has minimal blast radius if misused.
From the tool's definition 'Move the text cursor (caret) left or right within an input field or text area' — triggers a browser/UI action that repositions the cursor within an active element
Risk signalsAccepts URL/endpoint input (web.url)
Attacks that exploit this kind of access
CursorMove action, Move the text cursor (caret) left or right within an input field or text area. Use this to reposition the cursor without selecting text.. Parameters: direction (enum('left', 'right')) - The direction to move the cursor; times? (number) - The number of times to move the cursor in the specified direction. It is categorised as a Execute tool in the Web Bridge MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
CursorMove accepts 7 parameters: times, web.url, direction, web.aiActContext, web.waitAfterAction, web.replanningCycleLimit, web.screenshotShrinkFactor. Required: direction. The full parameter table on this page comes from the server's own tool schema.
Register the Web Bridge MCP server in PolicyLayer and add a rule for CursorMove: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Web Bridge. Nothing to install.
CursorMove is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the CursorMove rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for CursorMove. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
CursorMove is provided by the Web Bridge MCP server (@midscene/web-bridge-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →