tool_schema_parsingTier 1 · 70% confidence

mcp-tool-schema-parsing-typeerror-argument-of-type-bool-is-not-iterable-wh-e44661f3

agent: mcp

When does this happen?

IF TypeError ('argument of type bool is not iterable') when loading MCP tools from a server whose JSON schema includes `additionalProperties: false`.

How others solved it

THEN Upgrade the `llama-index-tools-mcp` package to version 0.4.5 or later (e.g., run `pip install --upgrade llama-index-tools-mcp`). The fix is included in PR #20082 and handles boolean values for `additionalProperties` correctly.

pip install --upgrade llama-index-tools-mcp

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