Directory Creation Tool

1st chunk of `crates/assistant_tools/src/create_directory_tool/description.md`

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Creates a new directory at the specified path within the project. Returns confirmation that the directory was created.

This tool creates a directory and all necessary parent directories (similar to `mkdir -p`). It should be used whenever you need to create new directories within the project.

Title: Directory Creation Tool

Summary

This tool creates a new directory, including any necessary parent directories, at the specified path within the project, and confirms its creation. It functions similarly to the `mkdir -p` command.