Connect Claude Code to tools via MCP changedmcp
Nearest release: v2.1.280, published 10 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 23 Sep 2026 01:47 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 23 Sep 2026 02:07 UTC.
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14161416* When Claude should search for your tools
14171417* Key capabilities your server provides
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1419Claude Code truncates tool descriptions and server instructions at 2KB each. Keep them concise to avoid truncation, and put critical details near the start.
1419Claude Code truncates each tool description and each server's instructions at 2,048 characters by default. Keep them concise, and put critical details near the start.
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1421To change the limit for every MCP server in your session, set [`CLAUDE_CODE_MAX_MCP_DESCRIPTION_LENGTH`](/docs/en/env-vars#variables) to a number of characters. This variable requires Claude Code v2.1.280 or later.
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14211423### Configure tool search
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