来着频道的参数如何透传给mcp工具。

来着频道的参数如何透传给mcp工具。

比如QQ号、电话号码、工号，这些不是在用户的问题里，而是频道请求的json顶层数据。既然可以作为会话的userid，那么应该可以透传给mcp吧。
不知道如何开发，请指导。

qwenpaw版本：2.1.0

No files or tests are referenced in the issue. Start by finding the code path that receives channel JSON payloads and the MCP tool-invocation path, then trace where request fields are filtered into tool-call context. Determine how top-level channel metadata (QQ number, phone, employee ID) should be included in that context, and add/update docs or mapping logic there. Completion means those fields are consistently reachable by MCP tools without relying on user text input.

索引モデルが issue の本文から書いたものです。