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

TableJSON 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

TableJSON 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 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 readOnly, idempotent, openWorld, and non-destructive, so the safety profile is covered. The description adds genuine behavioral context the annotations cannot express: concurrent vs. single-call batching semantics tied to objective grouping.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

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

Front-loads purpose, then uses a short bulleted block for use cases and a compact batching rule. Every line serves a purpose; the only minor cost is mild repetition between the purpose line and the first use case.

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

Completeness4/5

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

With an output schema present, the description needn't explain return values, and annotations cover the safety profile. What remains is fully sufficient for an agent to select and invoke correctly; only explicit sibling naming and the parameter limits are absent.

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 description coverage is 100%, so the baseline is 3; the description adds a bit more by explaining how the 'urls' and implicit 'objective' grouping should be partitioned across calls. It still doesn't restate the 10-URL cap or 200-char objective limit, which live only in the schema.

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+resource ('Fetch and extract relevant content from specific web URLs'), which is unambiguous. It implicitly separates itself from the 'web search' path by framing use cases around URLs the agent has 'already identified' versus discovering them, though it never names the sibling web_search_preview directly.

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

Usage Guidelines5/5

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

Provides an explicit 'Ideal Use Cases' list and, unusually, batching policy: separate calls for independent objectives, one call for related URLs sharing an objective. This tells the agent not just when to use it but how to structure invocation.

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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