DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.
Very large MCP_TIMEOUT values are capped instead of overflowing and timing out instantly.
What's wrong with this entry?
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MCP_TIMEOUTMCP_CONNECT_TIMEOUT_MS
What
MCP_TIMEOUT and MCP_CONNECT_TIMEOUT_MS are now capped at 2147483647 milliseconds. Values above that used to overflow the underlying timer and expire immediately; defaults remain 30000 and 5000 milliseconds.
Evidence
MCP_CONNECT_TIMEOUT_MS
Strings lifted out of the shipped bundle, so the claim above can be checked against them.