MCP Tool Schemas

MCP schema version: 1.

Tool	Mutation	Purpose
cadscript_project_inspect	No	Load and validate local model and config.
cadscript_sketch_preview	No	Return SVG from the shared sketch AST.
cadscript_bridge_health	No	Check native host, extension, and Onshape tabs.
onshape_documents	No	List signed-in user's documents.
onshape_project_create	Yes	Create a document and dedicated empty Part Studio.
onshape_selection	No	Read current narrow Onshape selection.
onshape_partstudio_observe	No	Read feature tree and regeneration notices.
cadscript_model_plan	No	Persist an immutable exact plan.
cadscript_model_apply	Yes	Apply one exact plan and verify a no-op result.
onshape_render	No	Return visible PNG image content.
onshape_measure	No	Return bounds and PLA mass via fixed FeatureScript (1.24 g/cm3).
onshape_export_stl	No	Write and validate a millimeter STL export.

There is intentionally no arbitrary API, page evaluation, FeatureScript, or feature mutation tool in the default server.