add_to_playlist

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

The description only states the basic operation. It does not disclose the dry_run parameter's behavior, whether duplicate additions are allowed, or if the operation is idempotent. With no annotations, the description carries full burden but provides minimal behavioral insight.

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 very short (one sentence). It is front-loaded and efficient, but the brevity comes at the cost of missing important details like dry_run.

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?

With 4 parameters, no output schema, and no annotations, the description is severely incomplete. It does not explain return values, error scenarios, behavior when position is null, or the effect of dry_run. A mutation tool requires more context for safe usage.

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%. The description only mentions 'video', 'playlist', and 'position', adding no meaning beyond the parameter names. The crucial 'dry_run' parameter is completely omitted, and no constraints or formats are described.

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 clearly states the action ('add'), the resource ('video to a playlist'), and an optional capability ('optionally at a specific position'). It distinguishes from sibling tools like 'remove_from_playlist' and 'create_playlist'.

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?

No guidance on when to use this tool versus alternatives. No mention of prerequisites, when not to use, or context such as required permissions or video existence.

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