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Add support for the optional description parameter in serverInfo

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This PR adds support for the optional `description` parameter in `serverInfo`.
This parameter has been supported since the 2025-11-25 MCP specification.
https://modelcontextprotocol.io/specification/2025-11-25/schema#implementation
This commit is contained in:
Koichi ITO 2025-12-20 15:01:51 +09:00
commit 851974e454
1 changed files with 28 additions and 1 deletions
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17
test/mcp/server_test.rb
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@ -68,6 +68,7 @@ module MCP
configuration.instrumentation_callback = instrumentation_helper.callback
@server = Server.new(
description: "Test server",
name: @server_name,
title: "Example Server Display Name",
version: "1.2.3",
@ -140,6 +141,7 @@ module MCP
tools: { listChanged: true },
},
serverInfo: {
description: "Test server",
name: @server_name,
title: "Example Server Display Name",
version: "1.2.3",
@ -815,6 +817,21 @@ module MCP
refute response[:result].key?(:instructions)
end
test "server uses description when configured with protocol version 2025-11-25" do
configuration = Configuration.new(protocol_version: "2025-11-25")
server = Server.new(description: "This is the MCP server used during tests.", name: "test_server", configuration: configuration)
assert_equal("This is the MCP server used during tests.", server.description)
end
test "raises error if description is used with protocol version 2025-06-18" do
configuration = Configuration.new(protocol_version: "2025-06-18")
exception = assert_raises(ArgumentError) do
Server.new(description: "This is the MCP server used during tests.", name: "test_server", configuration: configuration)
end
assert_equal("Error occurred in server_info. `description` is not supported in protocol version 2025-06-18 or earlier", exception.message)
end
test "server uses instructions when configured with protocol version 2025-03-26" do
configuration = Configuration.new(protocol_version: "2025-03-26")
server = Server.new(name: "test_server", instructions: "The server instructions.", configuration: configuration)