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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 25 Sep 2026
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Connect Claude Code to tools via MCP changedmcp

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Upstream edited this page at 25 Sep 2026 23:02 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 25 Sep 2026 23:07 UTC.

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### Images in tool results

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12861286 If you frequently encounter output warnings with specific MCP servers you don't control, consider increasing the `MAX_MCP_OUTPUT_TOKENS` limit. You can also ask the server author to add the `anthropic/maxResultSizeChars` annotation or to paginate their responses. The annotation has no effect on tools that return image content; for those, raising `MAX_MCP_OUTPUT_TOKENS` is the only option.
12871287</Warning>
12881288 
1289### Images in tool results
1290 
1291When an MCP tool returns a PNG, JPEG, GIF, or WebP image, Claude sees the image inline in the conversation. The inline copy may be scaled down or compressed to fit the model's image size limits. Claude Code also saves the original bytes to a file in the session's `tool-results` directory under [`~/.claude/projects/`](/docs/en/claude-directory#cleaned-up-automatically) and gives Claude the path. Claude can then crop, convert, or reuse the full-resolution file with tools such as Bash.
1292 
1293If you disable session persistence with [`--no-session-persistence`](/docs/en/cli-reference#cli-flags) or [`CLAUDE_CODE_SKIP_PROMPT_HISTORY`](/docs/en/env-vars), Claude Code writes no image file and Claude receives only the inline copy.
1294 
1295Saving MCP image results to a file requires Claude Code v2.1.283 or later.
1296 
12891297## Tool input schemas with a root-level combinator
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12911299Some MCP servers declare a tool's input schema as a JSON Schema union, with `anyOf`, `oneOf`, or `allOf` at the top level of the schema. The Claude API doesn't accept those keywords at the schema root. It does accept combinators nested inside `properties`, which Claude Code sends unchanged.
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