Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Tool description

WebSearch, as sent

SDK-CLI Agent SDK, print mode, v2.1.269. One model string produces this prompt.

As described in the system reminder: claude md request, not the ordinary one.

Lines5312 characters
Moved+0−0 against v2.1.268
Reach1model strings receive this description
Copies1distinct descriptions under this name
Parameters31 of them required Tools in captureall of themevery description on this arm
Plain text · sha256 da2fa36a5eab

The description, line by line

5 lines Line numbers are v2.1.268 on the left and this capture on the right.
1 1 Search the web. Returns result blocks with titles and URLs. US-only.
2 2
3 3 - The current month is September 2026 — use this when searching for recent information.
4 4 - `allowed_domains` / `blocked_domains` filter results.
5 5 - After answering from results, end with a "Sources:" list of the URLs you used as markdown links.

What it accepts

3 parameters The JSON parameter schema sent beside this description, 577 characters of it. Name, type, then whether the client marked it required.
allowed_domains string[] optional Only include search results from these domains
blocked_domains string[] optional Never include search results from these domains
query string required The search query to use

sha256 78ab127603dd · the schema as the client sent it:

{ "$schema": "https://json-schema.org/draft/2020-12/schema", "additionalProperties": false, "properties": { "allowed_domains": { "description": "Only include search results from these domains", "items": { "type": "string" }, "type": "array" }, "blocked_domains": { "description": "Never include search results from these domains", "items": { "type": "string" }, "type": "array" }, "query": { "description": "The search query to use", "minLength": 2, "type": "string" } }, "required": [ "query" ], "type": "object" }