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229c54c843
* 🪢 fix: Paginate MCP tools/list to load all tools
MCP `tools/list` is cursor-paginated, but LibreChat only ever read the
first page. `MCPConnection.fetchTools()` called `client.listTools()` once
and discarded `nextCursor`, and `MCPServerInspector` — which builds the
agent-facing tool registry at startup and per request — called the raw
`client.listTools()` directly. Servers that paginate (e.g. an aggregating
gateway exposing hundreds of tools) only ever exposed page one; tools on
later pages were never registered, and invoking one returned
"This tool's MCP server is temporarily unavailable."
- `MCPConnection.fetchTools()` now follows `nextCursor` across pages and
concatenates every page's tools, bounded by a configurable page cap
(`MCP_TOOLS_LIST_MAX_PAGES`, default 50) and a repeated-cursor guard so a
misbehaving server cannot loop forever. Tools already fetched are returned
if a later page fails, and the no-throw error contract is unchanged.
- `MCPServerInspector.getToolFunctions()` and `fetchServerCapabilities()`
now route through `fetchTools()`, so the canonical startup and
per-request tool registry is fully paginated too.
* style: Sort MCP test imports
* style: Sort mutation type imports
---------
Co-authored-by: Danny Avila <danny@librechat.ai>
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