Change RegisteredTool#inputSchema type from DOMString to object - #241
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beaufortfrancois wants to merge 2 commits into
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Change RegisteredTool#inputSchema type from DOMString to object#241beaufortfrancois wants to merge 2 commits into
RegisteredTool#inputSchema type from DOMString to object#241beaufortfrancois wants to merge 2 commits into
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domfarolino
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Aug 12, 2026
beaufortfrancois
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Aug 13, 2026
Ensure `inputSchema` is serialized to a string when returned as an object from `document.modelContext.getTools()`, aligning with the updated WebMCP specification and Chromium implementation. References: - https://chromium-review.googlesource.com/c/chromium/src/+/8248081 - webmachinelearning/webmcp#241
This was referenced Aug 13, 2026
fix: handle RegisteredTool.inputSchema as an object
beaufortfrancois/model-context-tool-inspector#34
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As discussed in #237 (comment),
ModelContextTool#inputSchemawas defined as anobjectduring registration, butRegisteredTool#inputSchemareturned a stringified JSON schema (DOMString) fromgetTools().This change aligns
RegisteredTool#inputSchemato be anobject(JavaScript object), matchingModelContextTool#inputSchemaand the MCP Tool specification.Hopefully we'll apply the same reasoning to
executeTool(myTool, {})instead ofexecuteTool(myTool, '{}')in #226Preview | Diff