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docs(agents): document the built-in SandBase tools - #56
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…tions replaces them New Agents get builtin:sandbase (server_label sandbase_builtin) by default. A list you send replaces that default, [] creates an Agent without tools, and the built-in entry must use the reserved label. The create example response now shows the default.
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The docs never mentioned that every new Agent gets the SandBase tools (
sandbase_discover/sandbase_inspect/sandbase_run) by default. They also did not say that sendingmcp_connectionsreplaces that default, so users who add their own MCP server lose the SandBase tools without any warning.agents/mcp-tools.md: new section Built-in SandBase tools. It shows the default entry, explains that a list you send replaces it, how to keep it alongside your own servers, that[]means no tools, and thatbuiltin:sandbaserequiresserver_label: "sandbase_builtin".api-reference/agents/create.md: themcp_connectionsfield description now covers the default. The example response shows the built-in entry, which is what an Agent created withoutmcp_connectionsreturns.I checked the behaviour against production on 2026-11-02 for four cases: omitted,
[], built-in with the correct label, and built-in with the wrong label (400). sandbase-monorepo#1321 makes that 400 say what to fix.