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Page Snapshot

page_snapshot

Read-onlyIdempotent

Return a bounded page outline with text excerpts, headings, links, buttons, inputs, forms, and recommended selectors for browser automation.

Instructions

Return a bounded page outline with text excerpt, headings, links, buttons, inputs, forms, and recommended selectors.

Input Schema

TableJSON Schema

Name	Required	Description
`include_html`	No	Include bounded outerHTML excerpts for summarized elements
`max_elements`	No	Maximum total headings/links/buttons/inputs/forms to return
`max_text_chars`	No	Maximum page text excerpt characters to return

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

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

Addedv0.8.0Aug 3, 2026
Removedv0.7.2Jul 22, 2026

Changed1 schema field changedv0.7.2Jul 22, 2026

changedOutput schema / oneOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "data": {
-        "additionalProperties": false,
-        "properties": {
-          "buttons": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "counts": {
-            "additionalProperties": {
-              "type": "integer"
-            },
-            "type": "object"
-          },
-          "forms": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "headings": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "inputs": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "limits": {
-            "additionalProperties": false,
-            "properties": {
-              "max_elements": {
-                "type": "integer"
-              },
-              "max_text_chars": {
-                "type": "integer"
-              }
-            },
-            "required": [
-              "max_elements",
-              "max_text_chars"
-            ],
-            "title": "PageSnapshotLimits",
-            "type": "object"
-          },
-          "links": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "meta": {
-            "additionalProperties": false,
-            "properties": {
-              "approx_tokens": {
-                "type": "integer"
-              },
-              "json_chars": {
-                "type": "integer"
-              },
-              "truncated": {
-                "type": "boolean"
-              }
-            },
-            "required": [
-              "approx_tokens",
-              "json_chars",
-              "truncated"
-            ],
-            "title": "ResponseMeta",
-            "type": "object"
-          },
-          "text_excerpt": {
-            "type": "string"
-          },
-          "title": {
-            "type": "string"
-          },
-          "truncated": {
-            "additionalProperties": false,
-            "properties": {
-              "elements": {
-                "type": "boolean"
-              },
-              "returned_elements": {
-                "type": "integer"
-              },
-              "text": {
-                "type": "boolean"
-              }
-            },
-            "required": [
-              "text",
-              "elements",
-              "returned_elements"
-            ],
-            "title": "PageSnapshotTruncation",
-            "type": "object"
-          },
-          "url": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "url",
-          "title",
-          "text_excerpt",
-          "headings",
-          "links",
-          "buttons",
-          "inputs",
-          "forms",
-          "counts",
-          "truncated",
-          "limits",
-          "meta"
-        ],
-        "title": "PageSnapshotData",
-        "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": {
+          "buttons": {
+            "items": {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            "title": "Buttons",
+            "type": "array"
+          },
+          "counts": {
+            "additionalProperties": {
+              "type": "integer"
+            },
+            "title": "Counts",
+            "type": "object"
+          },
+          "forms": {
+            "items": {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            "title": "Forms",
+            "type": "array"
+          },
+          "headings": {
+            "items": {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            "title": "Headings",
+            "type": "array"
+          },
+          "inputs": {
+            "items": {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            "title": "Inputs",
+            "type": "array"
+          },
+          "limits": {
+            "additionalProperties": true,
+            "title": "Limits",
+            "type": "object"
+          },
+          "links": {
+            "items": {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            "title": "Links",
+            "type": "array"
+          },
+          "meta": {
+            "additionalProperties": true,
+            "title": "Meta",
+            "type": "object"
+          },
+          "text_excerpt": {
+            "title": "Text Excerpt",
+            "type": "string"
+          },
+          "title": {
+            "title": "Title",
+            "type": "string"
+          },
+          "truncated": {
+            "additionalProperties": true,
+            "title": "Truncated",
+            "type": "object"
+          },
+          "url": {
+            "title": "Url",
+            "type": "string"
+          }
+        },
+        "required": [
+          "url",
+          "title",
+          "text_excerpt",
+          "headings",
+          "links",
+          "buttons",
+          "inputs",
+          "forms",
+          "counts",
+          "truncated",
+          "limits",
+          "meta"
+        ],
+        "title": "PageSnapshotData",
+        "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"
+  }
+]

Changed1 schema field changedv0.5.1Jul 6, 2026

changedOutput schema / oneOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "data": {
-        "additionalProperties": false,
-        "properties": {
-          "buttons": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "counts": {
-            "additionalProperties": {
-              "type": "integer"
-            },
-            "type": "object"
-          },
-          "forms": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "headings": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "inputs": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "limits": {
-            "additionalProperties": false,
-            "properties": {
-              "max_elements": {
-                "type": "integer"
-              },
-              "max_text_chars": {
-                "type": "integer"
-              }
-            },
-            "required": [
-              "max_elements",
-              "max_text_chars"
-            ],
-            "title": "PageSnapshotLimits",
-            "type": "object"
-          },
-          "links": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "action": {
-                  "type": "string"
-                },
-                "attributes": {
-                  "additionalProperties": {
-                    "type": [
-                      "string",
-                      "null"
-                    ]
-                  },
-                  "type": "object"
-                },
-                "href": {
-                  "type": "string"
-                },
-                "html": {
-                  "type": "string"
-                },
-                "index": {
-                  "type": "integer"
-                },
-                "method": {
-                  "type": "string"
-                },
-                "selector": {
-                  "type": "string"
-                },
-                "tag": {
-                  "type": "string"
-                },
-                "text": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "index",
-                "tag",
-                "text",
-                "selector",
-                "attributes"
-              ],
-              "title": "OutlineElement",
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "text_excerpt": {
-            "type": "string"
-          },
-          "title": {
-            "type": "string"
-          },
-          "truncated": {
-            "additionalProperties": false,
-            "properties": {
-              "elements": {
-                "type": "boolean"
-              },
-              "returned_elements": {
-                "type": "integer"
-              },
-              "text": {
-                "type": "boolean"
-              }
-            },
-            "required": [
-              "text",
-              "elements",
-              "returned_elements"
-            ],
-            "title": "PageSnapshotTruncation",
-            "type": "object"
-          },
-          "url": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "url",
-          "title",
-          "text_excerpt",
-          "headings",
-          "links",
-          "buttons",
-          "inputs",
-          "forms",
-          "counts",
-          "truncated",
-          "limits"
-        ],
-        "title": "PageSnapshotData",
-        "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": {
+          "buttons": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "action": {
+                  "type": "string"
+                },
+                "attributes": {
+                  "additionalProperties": {
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
+                  "type": "object"
+                },
+                "href": {
+                  "type": "string"
+                },
+                "html": {
+                  "type": "string"
+                },
+                "index": {
+                  "type": "integer"
+                },
+                "method": {
+                  "type": "string"
+                },
+                "selector": {
+                  "type": "string"
+                },
+                "tag": {
+                  "type": "string"
+                },
+                "text": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "index",
+                "tag",
+                "text",
+                "selector",
+                "attributes"
+              ],
+              "title": "OutlineElement",
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "counts": {
+            "additionalProperties": {
+              "type": "integer"
+            },
+            "type": "object"
+          },
+          "forms": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "action": {
+                  "type": "string"
+                },
+                "attributes": {
+                  "additionalProperties": {
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
+                  "type": "object"
+                },
+                "href": {
+                  "type": "string"
+                },
+                "html": {
+                  "type": "string"
+                },
+                "index": {
+                  "type": "integer"
+                },
+                "method": {
+                  "type": "string"
+                },
+                "selector": {
+                  "type": "string"
+                },
+                "tag": {
+                  "type": "string"
+                },
+                "text": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "index",
+                "tag",
+                "text",
+                "selector",
+                "attributes"
+              ],
+              "title": "OutlineElement",
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "headings": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "action": {
+                  "type": "string"
+                },
+                "attributes": {
+                  "additionalProperties": {
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
+                  "type": "object"
+                },
+                "href": {
+                  "type": "string"
+                },
+                "html": {
+                  "type": "string"
+                },
+                "index": {
+                  "type": "integer"
+                },
+                "method": {
+                  "type": "string"
+                },
+                "selector": {
+                  "type": "string"
+                },
+                "tag": {
+                  "type": "string"
+                },
+                "text": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "index",
+                "tag",
+                "text",
+                "selector",
+                "attributes"
+              ],
+              "title": "OutlineElement",
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "inputs": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "action": {
+                  "type": "string"
+                },
+                "attributes": {
+                  "additionalProperties": {
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
+                  "type": "object"
+                },
+                "href": {
+                  "type": "string"
+                },
+                "html": {
+                  "type": "string"
+                },
+                "index": {
+                  "type": "integer"
+                },
+                "method": {
+                  "type": "string"
+                },
+                "selector": {
+                  "type": "string"
+                },
+                "tag": {
+                  "type": "string"
+                },
+                "text": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "index",
+                "tag",
+                "text",
+                "selector",
+                "attributes"
+              ],
+              "title": "OutlineElement",
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "limits": {
+            "additionalProperties": false,
+            "properties": {
+              "max_elements": {
+                "type": "integer"
+              },
+              "max_text_chars": {
+                "type": "integer"
+              }
+            },
+            "required": [
+              "max_elements",
+              "max_text_chars"
+            ],
+            "title": "PageSnapshotLimits",
+            "type": "object"
+          },
+          "links": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "action": {
+                  "type": "string"
+                },
+                "attributes": {
+                  "additionalProperties": {
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
+                  "type": "object"
+                },
+                "href": {
+                  "type": "string"
+                },
+                "html": {
+                  "type": "string"
+                },
+                "index": {
+                  "type": "integer"
+                },
+                "method": {
+                  "type": "string"
+                },
+                "selector": {
+                  "type": "string"
+                },
+                "tag": {
+                  "type": "string"
+                },
+                "text": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "index",
+                "tag",
+                "text",
+                "selector",
+                "attributes"
+              ],
+              "title": "OutlineElement",
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "meta": {
+            "additionalProperties": false,
+            "properties": {
+              "approx_tokens": {
+                "type": "integer"
+              },
+              "json_chars": {
+                "type": "integer"
+              },
+              "truncated": {
+                "type": "boolean"
+              }
+            },
+            "required": [
+              "approx_tokens",
+              "json_chars",
+              "truncated"
+            ],
+            "title": "ResponseMeta",
+            "type": "object"
+          },
+          "text_excerpt": {
+            "type": "string"
+          },
+          "title": {
+            "type": "string"
+          },
+          "truncated": {
+            "additionalProperties": false,
+            "properties": {
+              "elements": {
+                "type": "boolean"
+              },
+              "returned_elements": {
+                "type": "integer"
+              },
+              "text": {
+                "type": "boolean"
+              }
+            },
+            "required": [
+              "text",
+              "elements",
+              "returned_elements"
+            ],
+            "title": "PageSnapshotTruncation",
+            "type": "object"
+          },
+          "url": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "url",
+          "title",
+          "text_excerpt",
+          "headings",
+          "links",
+          "buttons",
+          "inputs",
+          "forms",
+          "counts",
+          "truncated",
+          "limits",
+          "meta"
+        ],
+        "title": "PageSnapshotData",
+        "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"
+  }
+]

Addedv0.5.0Jun 29, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Annotations (readOnlyHint, idempotentHint, destructiveHint=false) already establish the safety profile. The description adds valuable context by highlighting the 'bounded' nature (controlled by max_elements and max_text_chars) and enumerating the output components, going beyond the bare annotations without contradiction.

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 a single, front-loaded sentence that directly states the tool's purpose and output scope without any filler. Every word adds meaning.

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

Completeness5/5

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

Given the simplicity of the tool, the presence of a rich output schema, and complete annotations, the description fully covers the necessary context. It communicates the key output categories and bounded nature, making it self-sufficient for agent invocation.

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% for all three parameters, so the schema already fully documents them. The description adds no additional parameter-specific detail; it focuses on the output rather than parameter behavior, which is acceptable but does not exceed the baseline.

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?

Description uses a specific verb ('Return') and a clear resource ('bounded page outline'), enumerating distinct content types (text excerpt, headings, links, buttons, inputs, forms, recommended selectors). This clearly differentiates it from sibling tools like page_accessibility_snapshot or page_observe.

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 implies usage for obtaining a summarized page overview but does not explicitly state when to use it instead of alternatives, nor does it mention exclusions or preconditions. It lacks the explicit alternative guidance seen in the calibration example.

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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