FastMCP + jq = response-trimming proxy

[Arithmomaniac]

Based on the discussion in #1046, I created a POC for transforming a (JSON) tool response via configuration.

It can be run as a single Python script file, and all it requires is editing of the MCPConfig:

config = {
    "mcpServers": {
        "default": { 
            "command": "npx",
            "args": ["-y", "@azure-devops/mcp", "msazure"],    
            "timeout": 30000
        }
    }
}

and the jq query you want to apply to each tool's response:

TOOL_TRANSFORMATIONS = {
    "repo_get_repo_by_name_or_id": '{"id", "name", "defaultBranch", "remoteUrl"}',
    "repo_get_pull_request_by_id": 'walk(if type == "object" then with_entries(select(.key | test("^(_links|.*[Uu]rl|href)$") | not)) else . end)'
}

You can check it out here: https://github.com/microsofthackathons/ado-mcp-transform