Crate mcp_schema
Source - Annotated
- Allows attaching optional annotations and arbitrary extra fields.
- Annotations
- Contains optional annotation data such as
audience or priority. - BlobResourceContents
- Represents binary resource contents.
- CallToolParams
- Parameters for the
tools/call method. - CallToolResult
- A result from the
tools/call method, potentially indicating an error. - CancelledNotificationParams
- Represents parameters for a cancelled-notification, which can be sent by either side.
- ClientCapabilities
- Describes capabilities a client might support.
- CompleteArgument
- An argument for
completion/complete (name + value). - CompleteParams
- Parameters for
completion/complete. - CompleteResult
- A result from
completion/complete. - CompletionData
- Data returned in the
completion field, containing possible completions. - CreateMessageParams
- Parameters for the
sampling/createMessage method. - CreateMessageResult
- A result from
sampling/createMessage. - EmbeddedResource
- An embedded resource, which can contain a text or blob resource internally.
- GetPromptParams
- Parameters for
prompts/get. - GetPromptResult
- A result returned by
prompts/get. - ImageContent
- Represents image content, stored in base64.
- Implementation
- Represents the name and version of an MCP implementation.
- InitializeParams
- Parameters for initializing communication (client -> server).
- InitializeResult
- A result returned by the server after an
initialize request. - JSONRPCError
- A JSON-RPC error message, indicating that a request failed.
- JSONRPCNotification
- A generic JSON-RPC notification. Notifications do not carry an
id. - JSONRPCRequest
- A generic JSON-RPC request.
- JSONRPCResponse
- A generic JSON-RPC response.
- ListPromptsResult
- A result containing a list of prompts known to the server.
- ListResourceTemplatesResult
- A result containing a list of resource templates known to the server.
- ListResourcesResult
- A result containing a list of resources known to the server.
- ListRootsParams
- Parameters for
roots/list. - ListRootsResult
- A result listing root URIs from the client.
- ListToolsResult
- A result listing server-provided tools.
- LoggingMessageParams
- A notification with a log message from the server.
- MCPNotificationParams
- Parameters for an MCP notification, allowing additional arbitrary fields via
flatten. - MCPRequestParams
- Parameters for an MCP request, allowing additional arbitrary fields via
flatten. - MCPResultBase
- Base result type for MCP responses.
- ModelHint
- A hint to use when selecting a model (e.g., substring matches).
- ModelPreferences
- Preferences for selecting a model, including cost or speed priorities.
- PaginatedParams
- A structure for request parameters that may involve pagination.
- PaginatedResult
- Indicates that a result can include pagination metadata.
- PingParams
- Parameters for the
ping method (client or server). Generally empty. - ProgressNotificationParams
- Parameters for a progress notification, typically referencing a long-running request.
- Prompt
- A prompt object or prompt template.
- PromptArgument
- Arguments accepted by a prompt, potentially required.
- PromptMessage
- A message returned as part of a prompt result.
- PromptsCapability
- Indicates server support for prompt-related features.
- RPCErrorDetail
- Provides details about a JSON-RPC error, including an optional
data field. - ReadResourceParams
- Parameters for the
resources/read method. - ReadResourceResult
- A result from the
resources/read method, containing resource contents. - RequestMeta
_meta field for MCP requests, optionally containing a progress token.- Resource
- A resource object that the server can read, possibly with extra metadata.
- ResourceTemplate
- A resource template, which can be used to generate resource URIs.
- ResourceUpdatedParams
- Parameters for a
notifications/resources/updated message. - ResourcesCapability
- Indicates server support for resource-related features.
- Root
- Represents a root directory or file, typically starting with
file://. - RootsCapability
- Describes whether the client supports updated-list notifications for roots.
- SamplingMessage
- A sampling message (one item in
CreateMessageParams). - ServerCapabilities
- A set of capabilities the server may support.
- SetLevelParams
- Parameters for enabling or adjusting server-side logging.
- SubscribeParams
- Parameters for
resources/subscribe. - TextContent
- Represents text content in a prompt or message.
- TextResourceContents
- Represents textual resource contents.
- Tool
- Defines a tool that can be invoked by the client.
- ToolInputSchema
- Describes the schema for a tool’s input parameters.
- ToolsCapability
- Indicates server support for tool-related features.
- UnsubscribeParams
- Parameters for
resources/unsubscribe.
- ClientNotification
- A union of all possible client notifications.
- ClientRequest
- A union of all possible client requests. The
method field identifies the variant. - LoggingLevel
- Syslog-like logging severity levels.
- ProgressToken
- A progress token for associating progress notifications with a request.
This can be either a string or a number.
- PromptContent
- Represents the content of a prompt message: text, image, or embedded resource.
- ReferenceType
- A reference to either a resource or a prompt.
- RequestId
- A request ID for JSON-RPC, which can be either a string or a number.
- ResourceContents
- Contents of a resource. May be text or binary data.
- Role
- A role in a conversation: either “user” or “assistant”.
- SamplingContent
- Represents a text or image message in sampling.
- ServerNotification
- A union of possible server notifications.
- ServerRequest
- A union of possible server requests.
- ServerResult
- A union of all possible server results.
- INTERNAL_ERROR
- INVALID_PARAMS
- INVALID_REQUEST
- JSONRPC_VERSION
- The JSON-RPC version string (always “2.0”).
- LATEST_PROTOCOL_VERSION
- The latest Model Context Protocol version.
- METHOD_NOT_FOUND
- PARSE_ERROR
- Cursor
- A cursor for pagination.
- EmptyResult
- Indicates success but carries no data.