Module server_discovery 

Typed server/discover vocabulary for the final MCP discovery surface.

The registry is deliberately declarative: it records only handlers and notification delivery paths that the surrounding server has actually installed. Discovery capabilities are derived from that immutable record, so a wire claim cannot accidentally advertise an unregistered behavior.

Structs

DiscoveryCacheHints

Required final caching hints for a server/discover result.

ServerBehaviorRegistry

Immutable registry of server behavior actually installed by the runtime.

ServerDiscoverCapabilities

Typed capability shape derived from an installed behavior registry.

ServerDiscoverRequest

Typed final params for a server/discover request.

ServerDiscoverResult

Typed server/discover result whose wire vocabulary is fixed to final MCP.

ServerInstructions

A validated server instruction string.

Enums

ServerBehavior

A server behavior whose installation can be advertised through discovery.

ServerDiscoveryError

Why a server discovery value could not be safely constructed or admitted.

ServerInstructionError

Why a server instruction string was rejected.

Constants

MAX_DISCOVERY_EXTENSION_NAME_BYTES

Maximum UTF-8 bytes in an enabled extension setting name.

MAX_DISCOVERY_EXTENSION_SETTINGS

Maximum number of enabled extension settings in one discovery result.

MAX_DISCOVERY_EXTENSION_VALUE_BYTES

Maximum JSON bytes in an enabled extension setting value.

MAX_SERVER_INSTRUCTIONS_BYTES

Maximum UTF-8 bytes permitted for server-provided discovery instructions.

SERVER_DISCOVER_METHOD

The exact JSON-RPC method for final server discovery.

SERVER_DISCOVER_SERVER_INFO_META_KEY

Reserved result-metadata key that identifies the responding server.

SERVER_DISCOVER_SUPPORTED_VERSIONS

The exact protocol-version list advertised by this final-only surface.