element_hoverMove the mouse over a specified web element to trigger hover-dependent UI, with optional pixel offsets and configurable timeout.
Move the mouse over an element.
| Name | Required | Description | Default |
|---|---|---|---|
| timeout | No | ||
| offset_x | No | Optional hover X offset. | |
| offset_y | No | Optional hover Y offset. | |
| selector | Yes | String locator or structured element target. |
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections. Dates show when Glama detected each change.
v0.8.0Input schema / $defsAdded value: +{
+ "AccessibilityTargetInput": {
+ "additionalProperties": false,
+ "description": "A unique accessibility role/name target within an optional DOM scope.",
+ "properties": {
+ "exact": {
+ "default": true,
+ "title": "Exact",
+ "type": "boolean"
+ },
+ "frame_selectors": {
+ "description": "Ordered outer-to-inner frame selectors resolved by DrissionPage.",
+ "items": {
+ "maxLength": 500,
+ "minLength": 1,
+ "type": "string"
+ },
+ "maxItems": 4,
+ "title": "Frame Selectors",
+ "type": "array"
+ },
+ "kind": {
+ "const": "accessibility",
+ "title": "Kind",
+ "type": "string"
+ },
+ "name": {
+ "anyOf": [
+ {
+ "maxLength": 500,
+ "minLength": 1,
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ],
+ "default": null,
+ "title": "Name"
+ },
+ "role": {
+ "maxLength": 500,
+ "minLength": 1,
+ "title": "Role",
+ "type": "string"
+ },
+ "shadow_hosts": {
+ "description": "Ordered outer-to-inner shadow host selectors resolved by DrissionPage.",
+ "items": {
+ "maxLength": 500,
+ "minLength": 1,
+ "type": "string"
+ },
+ "maxItems": 8,
+ "title": "Shadow Hosts",
+ "type": "array"
+ }
+ },
+ "required": [
+ "kind",
+ "role"
+ ],
+ "title": "AccessibilityTargetInput",
+ "type": "object"
+ },
+ "SelectorTargetInput": {
+ "additionalProperties": false,
+ "description": "A selector target with optional frame and shadow-root scope.",
+ "properties": {
+ "frame_selectors": {
+ "description": "Ordered outer-to-inner frame selectors resolved by DrissionPage.",
+ "items": {
+ "maxLength": 500,
+ "minLength": 1,
+ "type": "string"
+ },
+ "maxItems": 4,
+ "title": "Frame Selectors",
+ "type": "array"
+ },
+ "kind": {
+ "const": "selector",
+ "title": "Kind",
+ "type": "string"
+ },
+ "selector": {
+ "maxLength": 500,
+ "minLength": 1,
+ "title": "Selector",
+ "type": "string"
+ },
+ "shadow_hosts": {
+ "description": "Ordered outer-to-inner shadow host selectors resolved by DrissionPage.",
+ "items": {
+ "maxLength": 500,
+ "minLength": 1,
+ "type": "string"
+ },
+ "maxItems": 8,
+ "title": "Shadow Hosts",
+ "type": "array"
+ }
+ },
+ "required": [
+ "kind",
+ "selector"
+ ],
+ "title": "SelectorTargetInput",
+ "type": "object"
+ }
+}Input schema / properties / selector / anyOfAdded value: +[
+ {
+ "maxLength": 500,
+ "minLength": 1,
+ "type": "string"
+ },
+ {
+ "discriminator": {
+ "mapping": {
+ "accessibility": "#/$defs/AccessibilityTargetInput",
+ "selector": "#/$defs/SelectorTargetInput"
+ },
+ "propertyName": "kind"
+ },
+ "oneOf": [
+ {
+ "$ref": "#/$defs/SelectorTargetInput"
+ },
+ {
+ "$ref": "#/$defs/AccessibilityTargetInput"
+ }
+ ]
+ }
+]Input schema / properties / selector / descriptionPrevious value: -"CSS/XPath/DrissionPage element locator."New value: +"String locator or structured element target."Input schema / properties / selector / typeRemoved value: -"string"Input schema / properties / timeout / typePrevious value: -"integer"New value: +"number"Output schema / oneOfPrevious value: -[
- {
- "additionalProperties": false,
- "properties": {
- "data": {
- "additionalProperties": false,
- "properties": {
- "locator": {
- "title": "Locator",
- "type": "string"
- },
- "offset_x": {
- "anyOf": [
- {
- "type": "integer"
- },
- {
- "type": "null"
- }
- ],
- "title": "Offset X"
- },
- "offset_y": {
- "anyOf": [
- {
- "type": "integer"
- },
- {
- "type": "null"
- }
- ],
- "title": "Offset Y"
- },
- "selector": {
- "title": "Selector",
- "type": "string"
- },
- "selector_normalized": {
- "title": "Selector Normalized",
- "type": "boolean"
- },
- "selector_strategy": {
- "title": "Selector Strategy",
- "type": "string"
- },
- "url": {
- "title": "Url",
- "type": "string"
- }
- },
- "required": [
- "selector",
- "locator",
- "selector_strategy",
- "selector_normalized",
- "url",
- "offset_x",
- "offset_y"
- ],
- "title": "ElementHoverData",
- "type": "object"
- },
- "message": {
- "type": "string"
- },
- "ok": {
- "const": true
- }
- },
- "required": [
- "ok",
- "message",
- "data"
- ],
- "type": "object"
- },
- {
- "additionalProperties": false,
- "properties": {
- "data": {
- "additionalProperties": true,
- "type": "object"
- },
- "error": {
- "additionalProperties": false,
- "properties": {
- "code": {
- "type": "string"
- },
- "details": {
- "additionalProperties": true,
- "type": "object"
- },
- "message": {
- "type": "string"
- }
- },
- "required": [
- "code",
- "message"
- ],
- "type": "object"
- },
- "message": {
- "type": "string"
- },
- "ok": {
- "const": false
- }
- },
- "required": [
- "ok",
- "message",
- "error"
- ],
- "type": "object"
- }
-]New value: +[
+ {
+ "additionalProperties": false,
+ "properties": {
+ "data": {
+ "additionalProperties": false,
+ "properties": {
+ "exact": {
+ "anyOf": [
+ {
+ "type": "boolean"
+ },
+ {
+ "type": "null"
+ }
+ ],
+ "default": null,
+ "title": "Exact"
+ },
+ "frame_selectors": {
+ "items": {
+ "type": "string"
+ },
+ "title": "Frame Selectors",
+ "type": "array"
+ },
+ "locator": {
+ "title": "Locator",
+ "type": "string"
+ },
+ "name": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ],
+ "default": null,
+ "title": "Name"
+ },
+ "offset_x": {
+ "anyOf": [
+ {
+ "type": "integer"
+ },
+ {
+ "type": "null"
+ }
+ ],
+ "title": "Offset X"
+ },
+ "offset_y": {
+ "anyOf": [
+ {
+ "type": "integer"
+ },
+ {
+ "type": "null"
+ }
+ ],
+ "title": "Offset Y"
+ },
+ "role": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ],
+ "default": null,
+ "title": "Role"
+ },
+ "selector": {
+ "title": "Selector",
+ "type": "string"
+ },
+ "selector_normalized": {
+ "title": "Selector Normalized",
+ "type": "boolean"
+ },
+ "selector_strategy": {
+ "title": "Selector Strategy",
+ "type": "string"
+ },
+ "shadow_hosts": {
+ "items": {
+ "type": "string"
+ },
+ "title": "Shadow Hosts",
+ "type": "array"
+ },
+ "target_kind": {
+ "default": "selector",
+ "enum": [
+ "selector",
+ "accessibility"
+ ],
+ "title": "Target Kind",
+ "type": "string"
+ },
+ "url": {
+ "title": "Url",
+ "type": "string"
+ }
+ },
+ "required": [
+ "selector",
+ "locator",
+ "selector_strategy",
+ "selector_normalized",
+ "url",
+ "offset_x",
+ "offset_y"
+ ],
+ "title": "ElementHoverData",
+ "type": "object"
+ },
+ "message": {
+ "type": "string"
+ },
+ "ok": {
+ "const": true
+ }
+ },
+ "required": [
+ "ok",
+ "message",
+ "data"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "data": {
+ "additionalProperties": true,
+ "type": "object"
+ },
+ "error": {
+ "additionalProperties": false,
+ "properties": {
+ "code": {
+ "type": "string"
+ },
+ "details": {
+ "additionalProperties": true,
+ "type": "object"
+ },
+ "message": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "code",
+ "message"
+ ],
+ "type": "object"
+ },
+ "message": {
+ "type": "string"
+ },
+ "ok": {
+ "const": false
+ }
+ },
+ "required": [
+ "ok",
+ "message",
+ "error"
+ ],
+ "type": "object"
+ }
+]v0.7.2Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate destructiveHint=true and readOnlyHint=false, but the description adds no additional behavioral context such as triggering mouseover events, waiting for element visibility, or potential side effects of hovering. It merely restates the action without going beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, front-loaded sentence with no filler words. It is as concise as possible while conveying the core action.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple hover action, the description plus schema and annotations may be minimally sufficient, but it lacks guidance on when to use this tool relative to sibling tools and does not mention the structured target options or offset capabilities. It is adequate but not comprehensive.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 75%, with selector and offset parameters having descriptions in the schema. The tool description itself adds no parameter semantics beyond the schema, so a baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description 'Move the mouse over an element' clearly identifies a specific action (hover) and a target (an element). It is more specific than a tautology and matches the tool name, but it does not explicitly distinguish itself from related siblings like page_pointer_move or element_click.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No usage context is provided. The description does not explain when to prefer hover over click, mention typical use cases like tooltips or dropdown menus, or exclude coordinate-based alternatives such as page_pointer_move.
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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