create_magic_mask

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden. It discloses that the tool is AI-powered and requires a specific software version, which is helpful. However, it does not describe whether the operation is destructive, how performance is impacted, or error scenarios (e.g., if Neural Engine is unavailable). Additional behavioral context would improve transparency.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise with two sentences plus a parameter list. The main purpose is front-loaded. It could be slightly more structured (e.g., grouping prerequisites), but overall it is efficient without waste.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The output schema exists, so return values need not be explained. The description covers prerequisites and parameter roles. However, it lacks discussion of error handling, resource impact, or expected behavior when prerequisites are not met. For a creation tool with 4 parameters, it is adequate but not thorough.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It explains the 'mode' parameter with allowed values ('F', 'B', 'BI') and groups 'track_type/track_index/item_index' as clip locators. This adds meaning beyond the raw schema, though detailed semantics of each mode (forward, backward, bidirectional) are not fully elaborated.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states 'Create an AI-powered Magic Mask on a timeline item for subject isolation' with a clear verb and resource. It also notes a prerequisite (DaVinci Resolve Studio with Neural Engine). While it does not explicitly differentiate from the sibling 'regenerate_magic_mask', the distinction is implied by the verb 'create' versus 'regenerate'. Purpose is clear and specific.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description mentions a prerequisite (DaVinci Resolve Studio with Neural Engine) but provides no explicit guidance on when to use this tool versus alternatives like 'regenerate_magic_mask' or other timeline tools. Usage context is implied but lacks exclusions or comparisons.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.