# X_MCP_RECIPE_TOOL_UNKNOWN

## Means

an MCP recipe step names a tool this server does not project

## Typical cause

a tool was renamed or removed and a recipe still names it

## Fix

`steps: [{ tool: <a name the cause lists>, why }] — rename step.tool in the recipe the cause names, or expose the tool`

[MCP and AI](/error-codes#mcp-and-ai)