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Useful3 Signal2
MCP_TOOL_TIMEOUT is parsed with a minimum of 1 and ENABLE_MCP_LARGE_OUTPUT_FILES only disables when explicitly false.
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MCP_TOOL_TIMEOUTENABLE_MCP_LARGE_OUTPUT_FILES
What
MCP and main-loop code no longer reads environment variables directly with hand-rolled parsing. MCP_TOOL_TIMEOUT is now parsed as an integer with a minimum of 1 instead of a bare greater-than-zero check, and the large-output-files guard now only kicks in when ENABLE_MCP_LARGE_OUTPUT_FILES is explicitly false rather than on any truthy string.
Details
CLAUDE_AGENT_SDK_MCP_NO_PREFIXmoves to the same typed lookup.
Evidence
MCP_TOOL_TIMEOUT
Strings lifted out of the shipped bundle, so the claim above can be checked against them.