{"version":"2.1.323","anchor":"sendfile-tool-and-mcp-tool-call-path-new-fileartifact-hand","canonical_anchor":"sendfile-tool-and-mcp-tool-call-path-new-fileartifact-hand","heading":"Connector tool calls refuse file objects they cannot pass on","tier":"notice","area":"MCP","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.323\/e\/sendfile-tool-and-mcp-tool-call-path-new-fileartifact-hand","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.323","markdown":"### Connector tool calls refuse file objects they cannot pass on\n\nClaude Code now refuses a connector call that holds a file written as an id, type and size when it cannot pass that file on\n\n**Unclear.** It is not clear whether the hosted Chrome upload card is switched on for every user.\n\n**What**\n\nConnectors, also called MCP servers, are add-ons that give Claude extra tools. A connector can expect a file written as an object with an id, a mimeType and a size. Claude Code now refuses a tool call that holds such an object when the call cannot be passed on with it, and explains why.\n\nUploading a file through hosted Chrome browser tools can also show an upload card.\n\n**Why**\n\nThese are guardrails on how files get sent to connectors.\n\n- Flag `tengu_mcp_strip_trailing_xml_tags`: Not enough to say (read for one account on one subscription tier against v2.1.323; this account: no value returned, anonymous baseline: no value returned, compiled default: off) 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- Flag `tengu_send_file`: Not enough to say (read for one account on one subscription tier against v2.1.323; this account: no value returned, anonymous baseline: no value returned, compiled default: off) 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: 2\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}