Module types 

Core MCP data types for tool, resource, and prompt information.

Structs

FileParamSchemaEntry

Masked schema entry for a file parameter in a tool’s input schema.

FileUploadResult

Result of uploading a local file to the backend.

McpAppDisclosure

Compact disclosure facts about an MCP resource for app presentation surfaces.

McpClientStatus

Snapshot describing the MCP client at runtime.

McpElicitationRequest

Request payload for handling elicitation prompts from MCP providers.

McpElicitationResponse

Result returned by an elicitation handler after interacting with the user.

McpPromptDetail

Fully rendered MCP prompt ready for use.

McpPromptInfo

Summary of an MCP prompt exposed by a provider.

McpResourceData

Resource contents fetched from an MCP provider.

McpResourceInfo

Summary of an MCP resource exposed by a provider.

McpToolInfo

Information about an MCP tool exposed by a provider.

McpToolVisibility

Tool accessibility between model and app (SEP-1865 _meta.ui.visibility).

McpUiResourceMeta

Declared sandbox posture of an MCP Apps UI resource (SEP-1865 UIResourceMeta).

McpUiToolMeta

Linkage from an MCP tool to its MCP Apps UI resource.

ProvidedFilePayload

Shape of a file payload provided by the client after upload.

Constants

MCP_APP_DISCLOSURE_KEY

Tool-result key carrying per-URI app disclosure ({uri: McpAppDisclosure}).

MCP_APP_SUPPRESSED_KEY

Tool-result key listing app URIs refused by the off apps tier ([String]).

MCP_UI_EXTENSION_ID

MCP Apps extension identifier (io.modelcontextprotocol/ui).

MCP_UI_RESOURCE_MIME_TYPE

MIME type a ui:// app resource must serve.

MCP_UI_RESOURCE_SCHEME

URI scheme identifying MCP Apps UI resources.

OPENAI_FILE_PARAMS_META_KEY

Metadata key used in tool input schemas to indicate file upload parameters.

OPENAI_FILE_PARAMS_VALUE

Functions

disclose_app_resource

Derive disclosure facts from a resource read result.

parse_ui_resource_meta

Extract the UI sandbox posture from a resource’s _meta map.