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Claude Code adds Tool(param:value) syntax for tool permissions

Amy Reed · 19 June 2026

Claude Code introduced Tool(param:value) syntax for permission rules. It enables blocking or allowing tool executions based on parameters and wildcards.

Claude-code now includes the Tool(param:value) syntax for permission rules. Developers apply this to block or allow specific tool executions through input parameters and wildcards. Vibe Builders and Basic Users gain more targeted options for managing tool behavior.

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claude-code: Add parameter-level permission rules for tools | My AI Guide