Developer logs every byte from Apify MCP server to improve AI agent tool design
A developer with around 30 Actors on the Apify Store spent an afternoon testing how AI agents interact with his Jobs API Actor by making raw JSON-RPC calls and logging every server response. He connected the Actor to the Apify MCP server in minutes by appending its identifier to the server URL, then used curl instead of a chat client to capture raw traffic rather than transcripts. The experiment revealed four surprises, three of which prompted him to revise how he writes input schemas for his Actors. Key findings included that emojis and HTML formatting in property titles and descriptions pass through unchanged to the tool definition, where they are meaningless to an agent. The author notes these issues apply broadly to any Actor with more than three inputs, making the findings relevant to the wider Apify developer community.
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