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Expose server tool annotations on MCP::Client::Tool

Browse source 
Client#tools/#list_tools built Tool objects without an annotations
field even though the server includes annotations in every
tools/list response. Add the reader and pass the raw hash through,
mirroring how output_schema is already handled.
This commit is contained in:
rickreyhsig-wealthbox 2026-07-27 09:54:54 -04:00
commit 3591acdfaa
2 changed files with 27 additions and 2 deletions
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20
test/mcp/client/tool_test.rb
View file

@ -33,6 +33,24 @@ module MCP
assert_nil(@tool.output_schema)
end
def test_annotations_returns_nil_when_not_provided
assert_nil(@tool.annotations)
end
def test_annotations_returns_annotations_when_provided
tool_with_annotations = Tool.new(
name: "test_tool_with_annotations",
description: "A test tool with annotations",
input_schema: { "type" => "object" },
annotations: { "readOnlyHint" => true, "title" => "Test Tool" },
)
assert_equal(
{ "readOnlyHint" => true, "title" => "Test Tool" },
tool_with_annotations.annotations,
)
end
def test_output_schema_returns_output_schema_when_provided
tool_with_output = Tool.new(
name: "test_tool_with_output",
@ -53,12 +71,14 @@ module MCP
description: "A tool with all parameters",
input_schema: { "type" => "object" },
output_schema: { "type" => "object", "properties" => { "status" => { "type" => "boolean" } } },
annotations: { "readOnlyHint" => true },
)
assert_equal("full_tool", tool.name)
assert_equal("A tool with all parameters", tool.description)
assert_equal({ "type" => "object" }, tool.input_schema)
assert_equal({ "type" => "object", "properties" => { "status" => { "type" => "boolean" } } }, tool.output_schema)
assert_equal({ "readOnlyHint" => true }, tool.annotations)
end
end
end

3
test/mcp/client_test.rb
View file

@ -86,6 +86,7 @@ module MCP
"description" => "tool1",
"inputSchema" => {},
"outputSchema" => { "type" => "object", "properties" => { "result" => { "type" => "string" } } },
"annotations" => { "readOnlyHint" => true, "title" => "Tool One" },
},
{ "name" => "tool2", "description" => "tool2", "inputSchema" => {} },
],
@ -103,8 +104,10 @@ module MCP
assert_equal(2, tools.size)
assert_equal("tool1", tools.first.name)
assert_equal({ "type" => "object", "properties" => { "result" => { "type" => "string" } } }, tools.first.output_schema)
assert_equal({ "readOnlyHint" => true, "title" => "Tool One" }, tools.first.annotations)
assert_equal("tool2", tools.last.name)
assert_nil(tools.last.output_schema)
assert_nil(tools.last.annotations)
end
def test_tools_returns_empty_array_when_no_tools