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skill-disallowed-tools ​

Skill disallowed-tools must be an array of tool names

Error

Rule Details ​

The disallowed-tools field specifies tools that the skill must not use during execution. It must be a YAML array of valid tool name strings. Malformed values (e.g., a single string or non-string entries) will cause validation errors. This rule delegates to the Zod schema for validation. Note that disallowed-tools and allowed-tools are mutually exclusive; that constraint is enforced by the skill-allowed-tools rule.

Incorrect ​

disallowed-tools as a single string instead of an array

yaml
---
name: read-only
description: Read-only analysis skill
disallowed-tools: Write
---

Correct ​

Valid disallowed-tools array

yaml
---
name: read-only
description: Read-only analysis skill
disallowed-tools:
  - Write
  - Bash
---

No disallowed-tools field (optional)

yaml
---
name: deploy
description: Deploys the application
---

How To Fix ​

Ensure the disallowed-tools field is a YAML array where each entry is a string tool name. Remove the field entirely if no tools need to be denied.

Options ​

This rule does not have any configuration options.

Resources ​

Version ​

Available since: v0.2.0