get_playlist_items

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

With no annotations, the description carries the behavioral disclosure burden. It does reveal the output shape: "Returns playlist info and video list with titles, channels, and positions." However, it does not mention pagination, the max_results default, or the fact that "all videos" may be constrained by max_results.

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 two tight sentences with no filler. It front-loads the core action in the first sentence and then efficiently lists the expected return contents in the second.

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?

For a simple two-parameter tool, the description is largely sufficient: it names the resource, gives the required input by implication, and summarizes the return fields. It could be more complete by noting the max_results limit and default, but the schema already covers those details.

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?

The input schema already documents both parameters with 100% coverage, so the baseline is 3. The description does not add much parameter-specific meaning beyond the schema; it does not clarify how max_results relates to the claim of getting "all videos."

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 uses a specific verb and resource: "Get all videos in a YouTube playlist with metadata." It clearly identifies the tool's target as playlist items, which distinguishes it from sibling tools focused on transcripts, channels, trending videos, or video metadata.

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 intended use case is implied: use this tool when you need videos from a YouTube playlist. However, the description does not state when to prefer this over related siblings like get_channel_videos or search_videos, nor does it give any when-not-to-use guidance.

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