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.
Token counting for MCP tools now tracks which tools are actually loaded vs. deferred, providing more accurate context budget reporting when tool search is enabled.
Evidence
jyA() at line 402721 (returns mcpToolTokens, deferredToolTokens, loadedMcpToolNames)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
