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jumodada

DrissionPage MCP Server

by jumodada
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Python
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Click Element

element_click
Destructive

Perform clicks on web elements identified by CSS/XPath/text, including frames and shadow DOM, to automate browser workflows.

Instructions

Click an element found by CSS selector or XPath. Bare selectors are treated as CSS; use text:... for text matching.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
buttonNoNative pointer button to use.left
observeNoReturn a compact before/after page change summary.
timeoutNoTimeout in seconds to wait for element
selectorYesCSS selector or XPath to find the element. Bare selectors are CSS; use text:... for text matching or explicit tag:/css:/xpath:/@attr locators.
click_countNoNative click count; 2 requests double-click semantics.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed5 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"
+      }
+    ]
+  }
+]
    • 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": {
-          "button": {
-            "enum": [
-              "left",
-              "right",
-              "middle"
-            ],
-            "title": "Button",
-            "type": "string"
-          },
-          "changes": {
-            "anyOf": [
-              {
-                "additionalProperties": true,
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ],
-            "default": null,
-            "title": "Changes"
-          },
-          "click_count": {
-            "enum": [
-              1,
-              2
-            ],
-            "title": "Click Count",
-            "type": "integer"
-          },
-          "locator": {
-            "title": "Locator",
-            "type": "string"
-          },
-          "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",
-          "button",
-          "click_count"
-        ],
-        "title": "ElementClickData",
-        "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": {
+          "button": {
+            "enum": [
+              "left",
+              "right",
+              "middle"
+            ],
+            "title": "Button",
+            "type": "string"
+          },
+          "changes": {
+            "anyOf": [
+              {
+                "additionalProperties": true,
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "default": null,
+            "title": "Changes"
+          },
+          "click_count": {
+            "enum": [
+              1,
+              2
+            ],
+            "title": "Click Count",
+            "type": "integer"
+          },
+          "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"
+          },
+          "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",
+          "button",
+          "click_count"
+        ],
+        "title": "ElementClickData",
+        "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. Changed3 schema fields changedv0.7.2
    • addedInput schema / properties / button
      Added value: +{
+  "default": "left",
+  "description": "Native pointer button to use.",
+  "enum": [
+    "left",
+    "right",
+    "middle"
+  ],
+  "title": "Button",
+  "type": "string"
+}
    • addedInput schema / properties / click_count
      Added value: +{
+  "default": 1,
+  "description": "Native click count; 2 requests double-click semantics.",
+  "maximum": 2,
+  "minimum": 1,
+  "title": "Click Count",
+  "type": "integer"
+}
    • changedOutput schema / oneOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "data": {
-        "additionalProperties": false,
-        "properties": {
-          "changes": {
-            "additionalProperties": false,
-            "properties": {
-              "active_element": {
-                "anyOf": [
-                  {
-                    "additionalProperties": true,
-                    "properties": {
-                      "selector": {
-                        "type": "string"
-                      },
-                      "tag": {
-                        "type": "string"
-                      },
-                      "text": {
-                        "type": "string"
-                      }
-                    },
-                    "type": "object"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              },
-              "appeared_texts": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "console_errors_added": {
-                "type": "integer"
-              },
-              "console_warnings_added": {
-                "type": "integer"
-              },
-              "counts_after": {
-                "additionalProperties": {
-                  "type": "integer"
-                },
-                "type": "object"
-              },
-              "counts_before": {
-                "additionalProperties": {
-                  "type": "integer"
-                },
-                "type": "object"
-              },
-              "counts_delta": {
-                "additionalProperties": {
-                  "type": "integer"
-                },
-                "type": "object"
-              },
-              "new_console_messages": {
-                "items": {
-                  "additionalProperties": false,
-                  "properties": {
-                    "column": {
-                      "type": "integer"
-                    },
-                    "index": {
-                      "type": "integer"
-                    },
-                    "level": {
-                      "type": "string"
-                    },
-                    "line": {
-                      "type": "integer"
-                    },
-                    "source": {
-                      "type": "string"
-                    },
-                    "text": {
-                      "type": "string"
-                    },
-                    "url": {
-                      "type": "string"
-                    }
-                  },
-                  "required": [
-                    "index",
-                    "level",
-                    "text",
-                    "url",
-                    "line",
-                    "column",
-                    "source"
-                  ],
-                  "title": "ConsoleLog",
-                  "type": "object"
-                },
-                "type": "array"
-              },
-              "ready_state": {
-                "type": "string"
-              },
-              "removed_texts": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "title_after": {
-                "type": "string"
-              },
-              "title_before": {
-                "type": "string"
-              },
-              "title_changed": {
-                "type": "boolean"
-              },
-              "url_after": {
-                "type": "string"
-              },
-              "url_before": {
-                "type": "string"
-              },
-              "url_changed": {
-                "type": "boolean"
-              }
-            },
-            "required": [
-              "url_before",
-              "url_after",
-              "url_changed",
-              "title_before",
-              "title_after",
-              "title_changed",
-              "ready_state",
-              "counts_before",
-              "counts_after",
-              "counts_delta",
-              "appeared_texts",
-              "removed_texts",
-              "active_element",
-              "console_errors_added",
-              "console_warnings_added",
-              "new_console_messages"
-            ],
-            "title": "PageObservationChanges",
-            "type": "object"
-          },
-          "locator": {
-            "type": "string"
-          },
-          "selector": {
-            "type": "string"
-          },
-          "selector_normalized": {
-            "type": "boolean"
-          },
-          "selector_strategy": {
-            "type": "string"
-          },
-          "url": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "selector",
-          "locator",
-          "selector_strategy",
-          "selector_normalized",
-          "url"
-        ],
-        "title": "ElementClickData",
-        "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": {
+          "button": {
+            "enum": [
+              "left",
+              "right",
+              "middle"
+            ],
+            "title": "Button",
+            "type": "string"
+          },
+          "changes": {
+            "anyOf": [
+              {
+                "additionalProperties": true,
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "default": null,
+            "title": "Changes"
+          },
+          "click_count": {
+            "enum": [
+              1,
+              2
+            ],
+            "title": "Click Count",
+            "type": "integer"
+          },
+          "locator": {
+            "title": "Locator",
+            "type": "string"
+          },
+          "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",
+          "button",
+          "click_count"
+        ],
+        "title": "ElementClickData",
+        "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. Changed4 schema fields changedv0.5.1
    • addedInput schema / properties / observe
      Added value: +{
+  "default": false,
+  "description": "Return a compact before/after page change summary.",
+  "title": "Observe",
+  "type": "boolean"
+}
    • addedInput schema / properties / timeout / maximum
      Added value: +120
    • addedInput schema / properties / timeout / minimum
      Added value: +0
    • changedOutput schema / oneOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "data": {
-        "additionalProperties": false,
-        "properties": {
-          "locator": {
-            "type": "string"
-          },
-          "selector": {
-            "type": "string"
-          },
-          "selector_normalized": {
-            "type": "boolean"
-          },
-          "selector_strategy": {
-            "type": "string"
-          },
-          "url": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "selector",
-          "locator",
-          "selector_strategy",
-          "selector_normalized",
-          "url"
-        ],
-        "title": "ElementClickData",
-        "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": {
+          "changes": {
+            "additionalProperties": false,
+            "properties": {
+              "active_element": {
+                "anyOf": [
+                  {
+                    "additionalProperties": true,
+                    "properties": {
+                      "selector": {
+                        "type": "string"
+                      },
+                      "tag": {
+                        "type": "string"
+                      },
+                      "text": {
+                        "type": "string"
+                      }
+                    },
+                    "type": "object"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              },
+              "appeared_texts": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "console_errors_added": {
+                "type": "integer"
+              },
+              "console_warnings_added": {
+                "type": "integer"
+              },
+              "counts_after": {
+                "additionalProperties": {
+                  "type": "integer"
+                },
+                "type": "object"
+              },
+              "counts_before": {
+                "additionalProperties": {
+                  "type": "integer"
+                },
+                "type": "object"
+              },
+              "counts_delta": {
+                "additionalProperties": {
+                  "type": "integer"
+                },
+                "type": "object"
+              },
+              "new_console_messages": {
+                "items": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "column": {
+                      "type": "integer"
+                    },
+                    "index": {
+                      "type": "integer"
+                    },
+                    "level": {
+                      "type": "string"
+                    },
+                    "line": {
+                      "type": "integer"
+                    },
+                    "source": {
+                      "type": "string"
+                    },
+                    "text": {
+                      "type": "string"
+                    },
+                    "url": {
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "index",
+                    "level",
+                    "text",
+                    "url",
+                    "line",
+                    "column",
+                    "source"
+                  ],
+                  "title": "ConsoleLog",
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "ready_state": {
+                "type": "string"
+              },
+              "removed_texts": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "title_after": {
+                "type": "string"
+              },
+              "title_before": {
+                "type": "string"
+              },
+              "title_changed": {
+                "type": "boolean"
+              },
+              "url_after": {
+                "type": "string"
+              },
+              "url_before": {
+                "type": "string"
+              },
+              "url_changed": {
+                "type": "boolean"
+              }
+            },
+            "required": [
+              "url_before",
+              "url_after",
+              "url_changed",
+              "title_before",
+              "title_after",
+              "title_changed",
+              "ready_state",
+              "counts_before",
+              "counts_after",
+              "counts_delta",
+              "appeared_texts",
+              "removed_texts",
+              "active_element",
+              "console_errors_added",
+              "console_warnings_added",
+              "new_console_messages"
+            ],
+            "title": "PageObservationChanges",
+            "type": "object"
+          },
+          "locator": {
+            "type": "string"
+          },
+          "selector": {
+            "type": "string"
+          },
+          "selector_normalized": {
+            "type": "boolean"
+          },
+          "selector_strategy": {
+            "type": "string"
+          },
+          "url": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "selector",
+          "locator",
+          "selector_strategy",
+          "selector_normalized",
+          "url"
+        ],
+        "title": "ElementClickData",
+        "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"
+  }
+]
  4. Changed2 schema fields changedv0.5.0
    • addedInput schema / additionalProperties
      Added value: +false
    • removedOutput schema / additionalProperties
      Removed value: -false
  5. First observedv0.4.1

TDQS

A3.7/5.0
Behavior3/5

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

Annotations already indicate the tool is non-read-only and destructive (readOnlyHint=false, destructiveHint=true), so the agent knows it may mutate state. The description adds no further behavioral context, such as whether the click may trigger navigation, wait for page changes, or return an observe summary. It does not contradict the annotations, but it also does not enrich them.

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?

The description is two concise sentences, front-loaded with the core action and selector scope. Every word earns its place; no filler or redundant elaboration. Ideal length for a tool that is well-documented by its schema.

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

Completeness3/5

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

Given the complex schema and annotations, the description is passable but not comprehensive. It omits differentiation from closely related siblings like element_click_and_download or element_hover, and does not mention the observe option or accessibility/scope features. The schema fills many gaps, but the description alone would not fully prepare an agent for all usage scenarios.

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 description coverage is 100%, with detailed descriptions for each parameter (button, observe, timeout, selector, click_count). The tool description adds minimal new information, mostly repeating the schema's selector guidance. It does not explain the union type for selector or the accessibility option, but the schema already covers these. Baseline 3 is appropriate because the schema does the heavy lifting.

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

Purpose5/5

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

The description clearly states a specific action ('Click an element') and identifies the resource by selector type ('CSS selector or XPath'). It distinguishes this from sibling tools like element_hover (hovering) and page_click_xy (clicking at coordinates) through the explicit click verb and selector scope.

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?

The description provides some usage guidance on selector formats ('Bare selectors are treated as CSS; use text:... for text matching'), which helps invocation. However, it does not explicitly state when to prefer this tool over alternatives such as element_hover or element_click_and_download, nor does it mention any exclusions. Usage context is implied but not directly stated.

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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