Parallel Search MCP

web_fetch

Read-onlyIdempotent

Purpose: Fetch and extract relevant content from specific web URLs.

Ideal Use Cases:

Extracting content from specific URLs you've already identified
Exploring URLs returned by a web search in greater depth

For multiple independent extraction objectives, make separate web_fetch calls concurrently. Put related URLs that share one objective in a single call.

Input Schema

Name	Required	Description	Default
`urls`	Yes	List of URLs to extract content from. Must be valid HTTP/HTTPS URLs. Maximum 10 URLs per request.
`objective`	No	Natural-language description of what information you're looking for from the URLs. Limit to 200 characters.

Output Schema

Name	Required	Description
`usage`	No	Usage metrics for the extract request.
`errors`	Yes	Extract errors: requested URLs not in the results.
`results`	Yes	Successful extract results.
`warnings`	No	Warnings for the extract request, if any.
`extract_id`	Yes	Extract request ID, e.g. `extract_cad0a6d2dec046bd95ae900527d880e7`

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 27, 2026

addedOutput schema / $defs / ExtractResult / properties / acquired_at

Added value: +{
+  "anyOf": [
+    {
+      "format": "date-time",
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "When the returned content was acquired, as an RFC 3339 timestamp truncated to the start of the UTC day. Null when unknown.",
+  "examples": [
+    "2026-10-08T00:00:00Z"
+  ],
+  "title": "Acquired At"
+}

Changed1 schema field changedSep 10, 2026

changedOutput schema / $defs / UsageItem / properties / name / examples

Previous value: -[
-  "sku_search_additional_results",
-  "sku_extract_excerpts"
-]New value: +[
+  "sku_search",
+  "sku_extract_excerpts"
+]

Changed12 schema fields changedApr 17, 2026

addedInput schema / properties / objective / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / objective / default
```
Added value: +null
```

changedInput schema / properties / objective / description

Previous value: -"What information you're looking for from the URLs."New value: +"Natural-language description of what\ninformation you're looking for from the URLs. Limit to 200 characters."

removedInput schema / properties / objective / maxLength
```
Removed value: -200
```
addedInput schema / properties / objective / title
```
Added value: +"Objective"
```
removedInput schema / properties / objective / type
```
Removed value: -"string"
```

changedInput schema / properties / urls / description

Previous value: -"URLs to extract content from."New value: +"List of URLs to extract content from. Must be valid\nHTTP/HTTPS URLs. Maximum 10 URLs per request."

removedInput schema / properties / urls / items / format
```
Removed value: -"uri"
```
removedInput schema / properties / urls / maxItems
```
Removed value: -10
```
addedInput schema / properties / urls / title
```
Added value: +"Urls"
```
addedInput schema / title
```
Added value: +"extract_toolArguments"
```

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$defs": {
+    "ExtractError": {
+      "description": "Extract error details.",
+      "properties": {
+        "content": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Content returned for http client or server errors, if any.",
+          "title": "Content"
+        },
+        "error_type": {
+          "description": "Error type.",
+          "title": "Error Type",
+          "type": "string"
+        },
+        "http_status_code": {
+          "anyOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "HTTP status code, if available.",
+          "title": "Http Status Code"
+        },
+        "url": {
+          "title": "Url",
+          "type": "string"
+        }
+      },
+      "required": [
+        "url",
+        "error_type",
+        "http_status_code",
+        "content"
+      ],
+      "title": "ExtractError",
+      "type": "object"
+    },
+    "ExtractResult": {
+      "description": "Extract result for a single URL.",
+      "properties": {
+        "excerpts": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Relevant excerpted content from the URL, formatted as markdown.",
+          "title": "Excerpts"
+        },
+        "full_content": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Full content from the URL formatted as markdown, if requested.",
+          "title": "Full Content"
+        },
+        "publish_date": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Publish date of the webpage in YYYY-MM-DD format, if available.",
+          "title": "Publish Date"
+        },
+        "title": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Title of the webpage, if available.",
+          "title": "Title"
+        },
+        "url": {
+          "description": "URL associated with the search result.",
+          "title": "Url",
+          "type": "string"
+        }
+      },
+      "required": [
+        "url"
+      ],
+      "title": "ExtractResult",
+      "type": "object"
+    },
+    "UsageItem": {
+      "description": "Usage item for a single operation.",
+      "properties": {
+        "count": {
+          "description": "Count of the SKU.",
+          "examples": [
+            1
+          ],
+          "title": "Count",
+          "type": "integer"
+        },
+        "name": {
+          "description": "Name of the SKU.",
+          "examples": [
+            "sku_search_additional_results",
+            "sku_extract_excerpts"
+          ],
+          "title": "Name",
+          "type": "string"
+        }
+      },
+      "required": [
+        "name",
+        "count"
+      ],
+      "title": "UsageItem",
+      "type": "object"
+    },
+    "Warning": {
+      "description": "Human-readable message for a task.",
+      "properties": {
+        "detail": {
+          "anyOf": [
+            {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Optional detail supporting the warning.",
+          "title": "Detail"
+        },
+        "message": {
+          "description": "Human-readable message.",
+          "title": "Message",
+          "type": "string"
+        },
+        "type": {
+          "description": "Type of warning. Note that adding new warning types is considered a backward-compatible change.",
+          "enum": [
+            "spec_validation_warning",
+            "input_validation_warning",
+            "warning"
+          ],
+          "examples": [
+            "spec_validation_warning",
+            "input_validation_warning"
+          ],
+          "title": "Type",
+          "type": "string"
+        }
+      },
+      "required": [
+        "type",
+        "message"
+      ],
+      "title": "Warning",
+      "type": "object"
+    }
+  },
+  "description": "Fetch result.",
+  "properties": {
+    "errors": {
+      "description": "Extract errors: requested URLs not in the results.",
+      "items": {
+        "$ref": "#/$defs/ExtractError"
+      },
+      "title": "Errors",
+      "type": "array"
+    },
+    "extract_id": {
+      "description": "Extract request ID, e.g. `extract_cad0a6d2dec046bd95ae900527d880e7`",
+      "title": "Extract Id",
+      "type": "string"
+    },
+    "results": {
+      "description": "Successful extract results.",
+      "items": {
+        "$ref": "#/$defs/ExtractResult"
+      },
+      "title": "Results",
+      "type": "array"
+    },
+    "usage": {
+      "anyOf": [
+        {
+          "items": {
+            "$ref": "#/$defs/UsageItem"
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null,
+      "description": "Usage metrics for the extract request.",
+      "title": "Usage"
+    },
+    "warnings": {
+      "anyOf": [
+        {
+          "items": {
+            "$ref": "#/$defs/Warning"
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null,
+      "description": "Warnings for the extract request, if any.",
+      "title": "Warnings"
+    }
+  },
+  "required": [
+    "extract_id",
+    "results",
+    "errors"
+  ],
+  "title": "ExtractResponse",
+  "type": "object"
+}

Changed12 schema fields changedApr 17, 2026

removedInput schema / properties / objective / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedInput schema / properties / objective / default
```
Removed value: -null
```

changedInput schema / properties / objective / description

Previous value: -"Natural-language description of what\ninformation you're looking for from the URLs. Limit to 200 characters."New value: +"What information you're looking for from the URLs."

addedInput schema / properties / objective / maxLength
```
Added value: +200
```
removedInput schema / properties / objective / title
```
Removed value: -"Objective"
```
addedInput schema / properties / objective / type
```
Added value: +"string"
```

changedInput schema / properties / urls / description

Previous value: -"List of URLs to extract content from. Must be valid\nHTTP/HTTPS URLs. Maximum 10 URLs per request."New value: +"URLs to extract content from."

addedInput schema / properties / urls / items / format
```
Added value: +"uri"
```
addedInput schema / properties / urls / maxItems
```
Added value: +10
```
removedInput schema / properties / urls / title
```
Removed value: -"Urls"
```
removedInput schema / title
```
Removed value: -"extract_toolArguments"
```

changedOutput schema / (root)

Previous value: -{
-  "$defs": {
-    "ExtractError": {
-      "description": "Extract error details.",
-      "properties": {
-        "content": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Content returned for http client or server errors, if any.",
-          "title": "Content"
-        },
-        "error_type": {
-          "description": "Error type.",
-          "title": "Error Type",
-          "type": "string"
-        },
-        "http_status_code": {
-          "anyOf": [
-            {
-              "type": "integer"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "HTTP status code, if available.",
-          "title": "Http Status Code"
-        },
-        "url": {
-          "title": "Url",
-          "type": "string"
-        }
-      },
-      "required": [
-        "url",
-        "error_type",
-        "http_status_code",
-        "content"
-      ],
-      "title": "ExtractError",
-      "type": "object"
-    },
-    "ExtractResult": {
-      "description": "Extract result for a single URL.",
-      "properties": {
-        "excerpts": {
-          "anyOf": [
-            {
-              "items": {
-                "type": "string"
-              },
-              "type": "array"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "description": "Relevant excerpted content from the URL, formatted as markdown.",
-          "title": "Excerpts"
-        },
-        "full_content": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "description": "Full content from the URL formatted as markdown, if requested.",
-          "title": "Full Content"
-        },
-        "publish_date": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "description": "Publish date of the webpage in YYYY-MM-DD format, if available.",
-          "title": "Publish Date"
-        },
-        "title": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "description": "Title of the webpage, if available.",
-          "title": "Title"
-        },
-        "url": {
-          "description": "URL associated with the search result.",
-          "title": "Url",
-          "type": "string"
-        }
-      },
-      "required": [
-        "url"
-      ],
-      "title": "ExtractResult",
-      "type": "object"
-    },
-    "UsageItem": {
-      "description": "Usage item for a single operation.",
-      "properties": {
-        "count": {
-          "description": "Count of the SKU.",
-          "examples": [
-            1
-          ],
-          "title": "Count",
-          "type": "integer"
-        },
-        "name": {
-          "description": "Name of the SKU.",
-          "examples": [
-            "sku_search_additional_results",
-            "sku_extract_excerpts"
-          ],
-          "title": "Name",
-          "type": "string"
-        }
-      },
-      "required": [
-        "name",
-        "count"
-      ],
-      "title": "UsageItem",
-      "type": "object"
-    },
-    "Warning": {
-      "description": "Human-readable message for a task.",
-      "properties": {
-        "detail": {
-          "anyOf": [
-            {
-              "additionalProperties": true,
-              "type": "object"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "description": "Optional detail supporting the warning.",
-          "title": "Detail"
-        },
-        "message": {
-          "description": "Human-readable message.",
-          "title": "Message",
-          "type": "string"
-        },
-        "type": {
-          "description": "Type of warning. Note that adding new warning types is considered a backward-compatible change.",
-          "enum": [
-            "spec_validation_warning",
-            "input_validation_warning",
-            "warning"
-          ],
-          "examples": [
-            "spec_validation_warning",
-            "input_validation_warning"
-          ],
-          "title": "Type",
-          "type": "string"
-        }
-      },
-      "required": [
-        "type",
-        "message"
-      ],
-      "title": "Warning",
-      "type": "object"
-    }
-  },
-  "description": "Fetch result.",
-  "properties": {
-    "errors": {
-      "description": "Extract errors: requested URLs not in the results.",
-      "items": {
-        "$ref": "#/$defs/ExtractError"
-      },
-      "title": "Errors",
-      "type": "array"
-    },
-    "extract_id": {
-      "description": "Extract request ID, e.g. `extract_cad0a6d2dec046bd95ae900527d880e7`",
-      "title": "Extract Id",
-      "type": "string"
-    },
-    "results": {
-      "description": "Successful extract results.",
-      "items": {
-        "$ref": "#/$defs/ExtractResult"
-      },
-      "title": "Results",
-      "type": "array"
-    },
-    "usage": {
-      "anyOf": [
-        {
-          "items": {
-            "$ref": "#/$defs/UsageItem"
-          },
-          "type": "array"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "default": null,
-      "description": "Usage metrics for the extract request.",
-      "title": "Usage"
-    },
-    "warnings": {
-      "anyOf": [
-        {
-          "items": {
-            "$ref": "#/$defs/Warning"
-          },
-          "type": "array"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "default": null,
-      "description": "Warnings for the extract request, if any.",
-      "title": "Warnings"
-    }
-  },
-  "required": [
-    "extract_id",
-    "results",
-    "errors"
-  ],
-  "title": "ExtractResponse",
-  "type": "object"
-}New value: +null

Changed1 schema field changedApr 16, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$defs": {
+    "ExtractError": {
+      "description": "Extract error details.",
+      "properties": {
+        "content": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Content returned for http client or server errors, if any.",
+          "title": "Content"
+        },
+        "error_type": {
+          "description": "Error type.",
+          "title": "Error Type",
+          "type": "string"
+        },
+        "http_status_code": {
+          "anyOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "HTTP status code, if available.",
+          "title": "Http Status Code"
+        },
+        "url": {
+          "title": "Url",
+          "type": "string"
+        }
+      },
+      "required": [
+        "url",
+        "error_type",
+        "http_status_code",
+        "content"
+      ],
+      "title": "ExtractError",
+      "type": "object"
+    },
+    "ExtractResult": {
+      "description": "Extract result for a single URL.",
+      "properties": {
+        "excerpts": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Relevant excerpted content from the URL, formatted as markdown.",
+          "title": "Excerpts"
+        },
+        "full_content": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Full content from the URL formatted as markdown, if requested.",
+          "title": "Full Content"
+        },
+        "publish_date": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Publish date of the webpage in YYYY-MM-DD format, if available.",
+          "title": "Publish Date"
+        },
+        "title": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Title of the webpage, if available.",
+          "title": "Title"
+        },
+        "url": {
+          "description": "URL associated with the search result.",
+          "title": "Url",
+          "type": "string"
+        }
+      },
+      "required": [
+        "url"
+      ],
+      "title": "ExtractResult",
+      "type": "object"
+    },
+    "UsageItem": {
+      "description": "Usage item for a single operation.",
+      "properties": {
+        "count": {
+          "description": "Count of the SKU.",
+          "examples": [
+            1
+          ],
+          "title": "Count",
+          "type": "integer"
+        },
+        "name": {
+          "description": "Name of the SKU.",
+          "examples": [
+            "sku_search_additional_results",
+            "sku_extract_excerpts"
+          ],
+          "title": "Name",
+          "type": "string"
+        }
+      },
+      "required": [
+        "name",
+        "count"
+      ],
+      "title": "UsageItem",
+      "type": "object"
+    },
+    "Warning": {
+      "description": "Human-readable message for a task.",
+      "properties": {
+        "detail": {
+          "anyOf": [
+            {
+              "additionalProperties": true,
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Optional detail supporting the warning.",
+          "title": "Detail"
+        },
+        "message": {
+          "description": "Human-readable message.",
+          "title": "Message",
+          "type": "string"
+        },
+        "type": {
+          "description": "Type of warning. Note that adding new warning types is considered a backward-compatible change.",
+          "enum": [
+            "spec_validation_warning",
+            "input_validation_warning",
+            "warning"
+          ],
+          "examples": [
+            "spec_validation_warning",
+            "input_validation_warning"
+          ],
+          "title": "Type",
+          "type": "string"
+        }
+      },
+      "required": [
+        "type",
+        "message"
+      ],
+      "title": "Warning",
+      "type": "object"
+    }
+  },
+  "description": "Fetch result.",
+  "properties": {
+    "errors": {
+      "description": "Extract errors: requested URLs not in the results.",
+      "items": {
+        "$ref": "#/$defs/ExtractError"
+      },
+      "title": "Errors",
+      "type": "array"
+    },
+    "extract_id": {
+      "description": "Extract request ID, e.g. `extract_cad0a6d2dec046bd95ae900527d880e7`",
+      "title": "Extract Id",
+      "type": "string"
+    },
+    "results": {
+      "description": "Successful extract results.",
+      "items": {
+        "$ref": "#/$defs/ExtractResult"
+      },
+      "title": "Results",
+      "type": "array"
+    },
+    "usage": {
+      "anyOf": [
+        {
+          "items": {
+            "$ref": "#/$defs/UsageItem"
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null,
+      "description": "Usage metrics for the extract request.",
+      "title": "Usage"
+    },
+    "warnings": {
+      "anyOf": [
+        {
+          "items": {
+            "$ref": "#/$defs/Warning"
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null,
+      "description": "Warnings for the extract request, if any.",
+      "title": "Warnings"
+    }
+  },
+  "required": [
+    "extract_id",
+    "results",
+    "errors"
+  ],
+  "title": "ExtractResponse",
+  "type": "object"
+}

First observedJan 31, 2026

TDQS

A4.2/5.0

Behavior4/5

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds useful behavioral context about concurrent calls and batching related URLs in one request, but it does not discuss rate limits, authentication, or return behavior.

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 short, front-loaded with purpose, and organized into clear usage guidance. Every sentence adds practical value, especially the concurrency instruction, with no redundant restatement of schema details.

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 low parameter count, full schema description coverage, existing output schema, and rich annotations, the description provides enough context for correct invocation. It covers purpose, use cases, and batching behavior without needing to restate return values.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema already documents both parameters. The description adds meaningful semantics beyond the schema by explaining that related URLs sharing one objective should go in a single call while independent extraction objectives should use separate calls.

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?

The description states a clear verb and resource: 'Fetch and extract relevant content from specific web URLs.' It also distinguishes the use case from web search by focusing on 'URLs you've already identified' and exploring search results 'in greater depth,' though it does not name the sibling tool directly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

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

The 'Ideal Use Cases' section gives clear contexts for use, and the concurrency guidance explains when to make separate calls versus grouping related URLs. It does not explicitly state when not to use this tool or name web_search_preview as an alternative, so it falls short of a 5.

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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