Prompt capture
WebSearch tool description
27 model strings share this prompt, byte for byte.
2- Allows Claude to search the web and use the results to inform responses
3- Provides up-to-date information for current events and recent data
4- Returns search result information formatted as search result blocks, including links as markdown hyperlinks
5- Use this tool for accessing information beyond Claude's knowledge cutoff
6- Searches are performed automatically within a single API call
8CRITICAL REQUIREMENT - You MUST follow this:
9 - After answering the user's question, you MUST include a "Sources:" section at the end of your response
10 - In the Sources section, list all relevant URLs from the search results as markdown hyperlinks: [Title](URL)
11 - This is MANDATORY - never skip including sources in your response
12 - Example format:
14 [Your answer here]
16 Sources:
17 - [Source Title 1](https://example.com/1)
18 - [Source Title 2](https://example.com/2)
20Usage notes:
21 - Domain filtering is supported to include or block specific websites
22 - Web search is only available in the US
24IMPORTANT - Use the correct year in search queries:
25 - The current month is August 2026. You MUST use this year when searching for recent information, documentation, or current events.
26 - Example: If the user asks for "latest React docs", search for "React documentation" with the current year, NOT last year