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DrissionPage MCP Server

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Hover Element

element_hover
Destructive

Simulate a mouse hover over a web element using CSS selectors or accessibility roles, enabling tooltips, dropdown menus, and hover-triggered UI states during browser automation.

Instructions

Move the mouse over an element.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tab_idNoOptional MCP or native DrissionPage tab id. When omitted, the current tab is captured at call start.
timeoutNo
offset_xNoOptional hover X offset.
offset_yNoOptional hover Y offset.
selectorYesString locator or structured element target.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv0.8.8
    • addedInput schema / properties / tab_id
      Added value: +{
+  "anyOf": [
+    {
+      "maxLength": 128,
+      "minLength": 1,
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Optional MCP or native DrissionPage tab id. When omitted, the current tab is captured at call start.",
+  "title": "Tab Id"
+}
    • changedOutput schema / oneOf
      Previous 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"
-  }
-]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"
+          },
+          "tab_id": {
+            "description": "MCP tab id captured for this operation.",
+            "maxLength": 128,
+            "minLength": 1,
+            "type": "string"
+          },
+          "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",
+          "tab_id"
+        ],
+        "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"
+  }
+]
  2. Changed6 schema fields changedv0.8.0
    • addedInput schema / $defs
      Added 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"
+  }
+}
    • addedInput schema / properties / selector / anyOf
      Added value: +[
+  {
+    "maxLength": 500,
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "discriminator": {
+      "mapping": {
+        "accessibility": "#/$defs/AccessibilityTargetInput",
+        "selector": "#/$defs/SelectorTargetInput"
+      },
+      "propertyName": "kind"
+    },
+    "oneOf": [
+      {
+        "$ref": "#/$defs/SelectorTargetInput"
+      },
+      {
+        "$ref": "#/$defs/AccessibilityTargetInput"
+      }
+    ]
+  }
+]
    • changedInput schema / properties / selector / description
      Previous value: -"CSS/XPath/DrissionPage element locator."New value: +"String locator or structured element target."
    • removedInput schema / properties / selector / type
      Removed value: -"string"
    • changedInput schema / properties / timeout / type
      Previous value: -"integer"New value: +"number"
    • changedOutput schema / oneOf
      Previous 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"
+  }
+]
  3. Addedv0.7.2

TDQS

C2.3/5.0
Behavior2/5

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

Annotations already declare destructiveHint=true, readOnlyHint=false, openWorldHint=true, and idempotentHint=false, so the safety profile is covered. The description adds no behavioral context, such as what side effects hovering may trigger or whether the element must be scrolled into view, and it does not contradict 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.

Conciseness3/5

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

The description is a single front-loaded sentence with no wasted words, but it is too minimal for a 5-parameter tool with nested selector types and should at least clarify the hover mechanics.

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

Completeness2/5

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

Given the parameter count, nested selector schema, output schema, and sibling tools, the description is significantly incomplete. It omits usage context, selector handling, timeout behavior, and any behavioral caveats beyond what annotations already state.

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?

Schema coverage is 80%, so the schema documents most parameters including the selector union and offset fields. The description adds no parameter meaning beyond what the schema already provides, which is the baseline for high schema coverage.

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

Purpose3/5

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

The description states a specific action (move mouse) on a specific resource (element), but it largely restates the title and does not distinguish this tool from nearby 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.

Usage Guidelines1/5

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

There is no indication of when to use hover instead of alternatives, no prerequisites, and no mention of related tools such as page_pointer_move or element_click.

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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