ExtensionInputSchema class

Typed JSON Schema for the input parameters of a custom Marionette extension.

Equivalent of ToolInputSchema from the mcp_dart package, restricted to what the Dart VM service can actually carry: a flat object whose properties are scalar types. Nested objects/arrays cannot travel as a single VM service param (params are flattened to strings on the wire), so the type system makes that constraint a compile-time guarantee.

toJson() emits a JSON Schema object compatible with what marionette_mcp parses via mcp_dart's JsonSchema.fromJson — devs don't have to memorize the JSON Schema field names.

Annotations

• @immutable

Constructors

ExtensionInputSchema({Map<String, ExtensionParam> properties = const {}, List<String> required = const [], String? title, String? description})

const

Properties

description → String?

Human-readable description for the schema. Optional.

final

hashCode → int

The hash code for this object.

no setter, inherited

properties → Map<String, ExtensionParam>

Per-property schemas keyed by parameter name.

final

required → List<String>

Names of properties that must be present.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

title → String?

Human-readable title for the schema. Optional.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Map<String, dynamic>

Serializes to a JSON Schema object as expected by the MCP wire format produced by marionette.listExtensions.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited