{"version":"2.1.280","anchor":"new-control-plane-request-mcp-read-resource-mcp-apps-ui-re","canonical_anchor":"new-control-plane-request-mcp-read-resource-mcp-apps-ui-re","heading":"New control-plane request: mcp_read_resource (MCP Apps UI resources)","tier":"use","area":"SDK","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280\/e\/new-control-plane-request-mcp-read-resource-mcp-apps-ui-re","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280","markdown":"### New control-plane request: mcp_read_resource (MCP Apps UI resources)\n\nNew control-plane request lets a host read MCP Apps UI resources without triggering a model turn\n\n**What**\n\nA new SDK control request, `mcp_read_resource`, lets a host application read a single `ui:\/\/`-scheme resource from a connected MCP server using the `resources\/read` method. It's read-only and doesn't trigger a model turn. It comes with a full schema, defined error handling, and a size limit, and is advertised during session setup as the `mcp_read_resource_v1` capability.\n\n**Why**\n\nThis gives host applications a way to fetch MCP Apps UI resources (part of the SEP-1865 proposal for richer MCP UI integrations) directly and cheaply, without needing to route the request through a model turn.\n\n- Area: SDK\n- Names: `mcp_read_resource`\n- Tier: Use it now\n- Useful: 4\/5\n- Signal: 2\/5"}