WebFetch tool description
CLI Claude Code, interactive mode, v2.1.283. The text the model is given for this tool, line by line, with each line marked against the previous capture taken the same way. 10 model strings share this prompt, byte for byte.
Lines6469 characters
Moved+5−20 against v2.1.282
Sent to10model strings get this description
Copies2distinct descriptions under this name
Parameters22 of them required
Every tool→every description on this arm
2 genuinely different descriptions of this tool
Plain text · sha256 28495ef9c5ab
The description, rendered
This renders the markdown inside the description, so it isn’t quite the description itself.The raw view and the plain text are the bytes as they were sent.
Fetches a URL, converts the page to markdown, and answers prompt against it using a small fast model.
- Fails on authenticated/private URLs — use an authenticated MCP tool or
ghfor those instead. - Fails on localhost and other hostnames without a dot; for a local server, use curl via Bash.
- HTTP is upgraded to HTTPS. Cross-host redirects are returned to you rather than followed; call again with the redirect URL.
- Responses are cached for 15 minutes per URL.
What it accepts
2 parameters The JSON parameter schema sent beside this description, 380 characters of it. Name, type, then whether the client marked it required.prompt
string
required
The prompt to run on the fetched content
url
string
required
The URL to fetch content from
sha256 79f70c017c3b · the schema as the client sent it:
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"prompt": {
"description": "The prompt to run on the fetched content",
"type": "string"
},
"url": {
"description": "The URL to fetch content from",
"format": "uri",
"type": "string"
}
},
"required": [
"url",
"prompt"
],
"type": "object"
}