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by io.github.WellApp-ai
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Open an address

well_browser_navigate

Open an http(s) address in a Well tab, or go "back" or "forward" in its history. It acts in the Well tab group of the caller's own Chrome, picked with well_select_browser (or the only one connected). Refs come from well_browser_read_page or well_browser_find and go stale when the page changes: read again then.

Input Schema

NameRequiredDescriptionDefault
urlYes
tab_idNoThe tab, as tabs_context lists it (tab-N). Default: the active tab of the Well group.
workspace_idNoTarget workspace. Omit when the token authorizes one workspace. Required when it authorizes several — a write lands in exactly one workspace and this call would not say which.
conversation_idNoThe conversation id returned by the previous Well result, in its meta under well/conversation_id, in its structuredContent, or in its JSON text block. Pass it back on every call in the same conversation, including a call a card makes, so the chosen workspace and the earlier answers still apply. It decides the conversation on its own: nothing the host states about the session replaces it. Omit it only on the first call of a conversation.
idempotency_keyNoOptional client-supplied key. A retried write with the same key returns the original result instead of re-applying the operation.
workspace_scopeNoRestrict this call to the family: the token's primary workspace plus the company workspaces under it that you are a member of. Unrelated authorized workspaces drop out of the read; row reads merge across the family, while a per-workspace figure still reports exactly one workspace.

Output Schema

NameRequiredDescriptionDefault
tabsNo
textNo
errorNo
notesNo
statusNo
successYes
state_changesNo
conversation_idNoThe conversation this result belongs to. Pass it back as the conversation_id argument on every later Well call in the same conversation.
newly_connectedNoTools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. The connected-line rule says when to tell an entry; when it does, one line per entry, in the person's language: "<name> is connected.". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later.
conversation_id_noteNoPresent only when the server opened a fresh lane, stating that no choice recorded earlier was read.
conversation_id_sourceNoWhere the conversation id came from: the host's own request meta, the caller's argument, or a fresh lane the server opened.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "conversation_id": {
+      "description": "The conversation this result belongs to. Pass it back as the conversation_id argument on every later Well call in the same conversation.",
+      "type": "string"
+    },
+    "conversation_id_note": {
+      "description": "Present only when the server opened a fresh lane, stating that no choice recorded earlier was read.",
+      "type": "string"
+    },
+    "conversation_id_source": {
+      "description": "Where the conversation id came from: the host's own request meta, the caller's argument, or a fresh lane the server opened.",
+      "enum": [
+        "host_meta",
+        "argument",
+        "minted"
+      ],
+      "type": "string"
+    },
+    "error": {
+      "type": "string"
+    },
+    "newly_connected": {
+      "description": "Tools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. The connected-line rule says when to tell an entry; when it does, one line per entry, in the person's language: \"<name> is connected.\". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later.",
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "name": {
+            "type": "string"
+          },
+          "service_id": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "name",
+          "service_id"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "notes": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "state_changes": {
+      "items": {
+        "oneOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "tab_id": {
+                "maxLength": 4096,
+                "minLength": 1,
+                "type": "string"
+              },
+              "type": {
+                "const": "tab_opened",
+                "type": "string"
+              }
+            },
+            "required": [
+              "type",
+              "tab_id"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "download_id": {
+                "minLength": 1,
+                "type": "string"
+              },
+              "type": {
+                "const": "download_started",
+                "type": "string"
+              },
+              "url": {
+                "maxLength": 4096,
+                "type": "string"
+              }
+            },
+            "required": [
+              "type",
+              "download_id",
+              "url"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "download_id": {
+                "minLength": 1,
+                "type": "string"
+              },
+              "path": {
+                "maxLength": 4096,
+                "type": "string"
+              },
+              "size_bytes": {
+                "maximum": 9007199254740991,
+                "minimum": 0,
+                "type": "integer"
+              },
+              "type": {
+                "const": "download_completed",
+                "type": "string"
+              },
+              "url": {
+                "maxLength": 4096,
+                "type": "string"
+              }
+            },
+            "required": [
+              "type",
+              "download_id",
+              "url"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "download_id": {
+                "minLength": 1,
+                "type": "string"
+              },
+              "error": {
+                "maxLength": 4096,
+                "type": "string"
+              },
+              "type": {
+                "const": "download_failed",
+                "type": "string"
+              },
+              "url": {
+                "maxLength": 4096,
+                "type": "string"
+              }
+            },
+            "required": [
+              "type",
+              "download_id",
+              "url"
+            ],
+            "type": "object"
+          }
+        ]
+      },
+      "type": "array"
+    },
+    "status": {
+      "enum": [
+        "ok",
+        "failed"
+      ],
+      "type": "string"
+    },
+    "success": {
+      "type": "boolean"
+    },
+    "tabs": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "active": {
+            "type": "boolean"
+          },
+          "tab_id": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "title": {
+            "maxLength": 4096,
+            "type": "string"
+          },
+          "url": {
+            "maxLength": 4096,
+            "type": "string"
+          }
+        },
+        "required": [
+          "tab_id",
+          "title",
+          "url"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "text": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "success"
+  ],
+  "type": "object"
+}
  2. Added

TDQS

A3.5/5.0
Behavior4/5

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

Annotations say readOnlyHint=false, destructiveHint=false, openWorldHint=true; the description adds real context beyond that: the action occurs in the caller's own Chrome's Well tab group, the browser must be chosen via well_select_browser, and page refs go stale after the page changes. It does not cover failure behavior or rate/timeout characteristics, keeping it short of a 5.

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 first sentence is well front-loaded and dense; the second carries the environment prerequisite. The third sentence about refs is confusing in context because no ref parameter exists in the schema and its placement after the browser-selection sentence disrupts the flow.

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?

Output schema and annotations exist, so return values and safety profile need not be explained. What is missing is precisely the information an agent needs to call it correctly: how to request back/forward, and what url accepts besides an http(s) address — a real gap given url is the only required parameter.

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 83%, so the baseline is 3. The description adds that url takes an http(s) address and that back/forward are possible, but never says how back/forward is expressed (presumably a sentinel value in url) and introduces "refs" without a corresponding parameter, leaving the key parameter's accepted values ambiguous.

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

Purpose4/5

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

States a specific verb and resource ("Open an http(s) address in a Well tab") plus the history-navigation variant, which is far more informative than the title "Open an address". It differentiates itself from well_browser_read_page and well_browser_find by naming them as ref sources rather than covering the same action, though the refs remark muddies what the tool itself accepts.

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?

"It acts in the Well tab group of the caller's own Chrome, picked with well_select_browser (or the only one connected)" gives a useful precondition and names the sibling that selects the browser. However there is no explicit when-not guidance (e.g., use well_browser_new_tab to open a fresh tab, well_browser_left_click to follow a link) even though those siblings exist in the same group.

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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