Often the travel history is the uploaded PDFs, and an assistant could not
learn that a trip had any: there was no files.mcp.ts, no files scope, and no
files section in the trip summary.
Six tools: list, read contents, set description and primary link, add a
link, remove one, list them. Reading contents rides files:content rather
than files:read, because listing what a trip carries and reading what is
inside a booking PDF are different privileges.
The content read is not a second copy of the plugin path. readContent moved
out of files.rpc.ts into FilesService and both callers use it, so the 10 MB
cap, the storage-layer read and the off-thread decode stay in one place. The
RPC keeps its own error wording, which its tests still pin.
Maurice