| > Let's say you have a jq MCP. How do you pass data in and out to/from it without the data also being processed as tokens? Provide a meta-tool which handles piping data in and out of any other tool, and make specific tools which can read/write data sources directly, bypassing context. Or you could go full code mode, but I'm not sure it's worth the lift unless you have Cloudflare numbers of APIs which would need tools. I work on an internal model/vendor-independent chat app where the agent runs in the browser - every chat gets its own virtual origin private filesystem (OPFS) [1] directory where user attachments get written to and tools can read from/write to, and users can also provide read/write access to a real directory with window.showDirectoryPicker() [2] (both use the same API, so tools can route to/from either). It can push and pull MBs of data through tools, e.g. pulling huge spreadsheets directly from SharePoint in 50,000 row chunks using a tool which calls the Excel Services REST API, passing those all into a code execution tool to join them together and process them, which generates an Excel output file using SheetJS, none of which goes into context. People used to drag their multi-MB documents in and complain either it didn't work or the agent couldn't do anything useful with it. Now it just works. [1] https://developer.mozilla.org/en-US/docs/Web/API/File_System... [2] https://developer.mozilla.org/en-US/docs/Web/API/Window/show... |
I'm not saying MCP or the ways we use it cannot be extended to cover this use case, but my understanding is that nobody does it. But shell/code does, and more.