set_default_transition

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

No annotations are provided, so the description carries the full behavioral burden. It does not say whether the setting persists across sessions, whether it applies to all new sequences, what happens to duration when omitted, or what the tool returns — all material for a settings mutation.

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?

A single front-loaded sentence with zero waste. It is efficient, though the brevity comes at the cost of the missing behavioral detail rather than being tight-but-complete.

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?

Parameter semantics are fully covered by the schema, so the remaining gap is behavioral: scope of the default, persistence, and the source of valid transition names. For a low-risk settings mutation with no output schema, this is adequate but leaves real questions open.

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 coverage is 100%, with all three parameters documented including the video/audio enum, so the schema already does the heavy lifting. The description only restates 'video or audio' and adds nothing about duration defaults or valid transition naming.

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?

Names a specific verb ('Set') and resource ('default video or audio transition'), and the word 'default' distinguishes it from apply_transition/remove_transition, which act on clips. It never states that distinction explicitly, so an agent must infer it from the name and its knowledge of the sibling set.

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?

There is no guidance on when to use this versus apply_transition, nor any mention that valid transitionName values likely come from get_video_transitions_list or get_audio_transitions_list. The only usage signal is implied by the word 'default'.

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