glyphs-mini-mcp

Tool annotations match behaviour

1 read-only tool performs write/delete/exec — glyphs_open_in_mini (line 502: proc = subprocess.run(["open", "-a", "Glyphs Mini", _STATE["path"]], capture_output=True, text=True))

Either remove the readOnlyHint:true annotation, or remove the write/delete call from the tool handler.

Descriptions match behaviour

2 tools describe read intent but their handlers mutate — glyphs_render_specimen (line 475: proc = subprocess.run([sys.executable, "-m", "fontmake", "-g", _STATE["path"], "-o", "ttf",); glyphs_open_in_mini (line 502: proc = subprocess.run(["open", "-a", "Glyphs Mini", _STATE["path"]], capture_output=True, text=True))

Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.

Tool inputs are validated

14/17 tool handlers declare input schemas (82%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

Only 2/17 tool handlers wrap calls in try/catch (12%)

Wrap each tool handler body in try/catch and return a structured error response.

Tests exist

No test files found

Add tests that exercise each declared tool.

Tool description accuracy

glyphs_render_specimen: description implies read-only but handler writes/deletes/executes; glyphs_open_in_mini: description implies read-only but handler writes/deletes/executes

Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.