{"version":"2.1.317","anchor":"mcp-large-result-handling-reports-outcome-to-the-host","canonical_anchor":"mcp-large-result-handling-reports-outcome-to-the-host","heading":"MCP image and large-output results now report what happened to them","tier":"notice","area":"MCP","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.317\/e\/mcp-large-result-handling-reports-outcome-to-the-host","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.317","markdown":"### MCP image and large-output results now report what happened to them\n\nMCP image, binary and large results now report whether each was shown, saved, kept, cut or failed to save, so hosts can see how it was handled\n\n**What**\n\nMCP servers are outside programs that give Claude Code extra tools. When one returns an image, binary data or a very large result, Claude Code handles it specially. Those paths now report the outcome for each result as one of:\n\n- `shown`\n\n- `saved`\n\n- `kept_in_conversation`\n\n- `cut_not_saved`\n\n- `save_failed`\n\n- `saved_as_text`\n\nThe general step that saves tool results to disk also reports `cut_not_saved` and `saved_as_text`. Images are now read back from the picture reader only when it asks for the picture to be shrunk. What the model sees is unchanged. The `tengu_mcp_singleton_unwrap` switch is unchanged and falls back to on when the server sends nothing.\n\n**Why**\n\nA host, meaning the app that embeds Claude Code, can now tell whether a large MCP result was cut short or saved to a file, and show that to you instead of leaving it hidden.\n\n- Flag `tengu_mcp_singleton_unwrap`: On for this account, and not off by default (read for one account on one subscription tier against v2.1.317; this account: on, anonymous baseline: on, compiled default: on) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Area: MCP\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}