Connect YouTube Live Chat bus

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

The description adds useful context beyond annotations by listing scaffold contents (sanitized rows, tiers, moderation policy, adapter source, safety notes). Annotations (readOnlyHint=false, openWorldHint=true, destructiveHint=false) already indicate a non-destructive write operation. However, the description does not disclose potential side effects like API authentication needs or whether it actually contacts YouTube, which openWorldHint=true might imply.

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 a single, compact sentence that front-loads the primary action ('Create a YouTube Live Chat scaffold') and then lists the scaffold's features as a phrase series. It is efficiently sized with no wasted words, though it packs many items into one sentence.

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 10 parameters, no output schema, and no required fields, the description is too minimal. It fails to explain what the tool returns, how connection via adapter_url/adapter_mode works, or the role of parameters like channel_id and live_chat_id. The scaffold concept is partially described, but the operational context (how to use it, what the result looks like) is missing.

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 only 20% (2 of 10 parameters have descriptions), so the description must compensate. It does map some concepts ('Super Chat tiers' → super_chat_tier_count, 'moderation policy' → moderation_level, 'adapter source' → adapter_url/adapter_mode), but leaves many parameters (active, channel_id, live_chat_id, message_count, parent_path) unexplained in both schema and description. This is insufficient for an agent to correctly configure the scaffold.

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 tool 'Create[s] a YouTube Live Chat scaffold' with specific components (sanitized message rows, Super Chat tiers, moderation policy, adapter source, API/quota safety notes). This distinguishes it from other chat bus tools by platform and scaffold focus, though the name 'connect' versus description 'create' introduces slight ambiguity about whether it establishes a live connection or merely generates a scaffold.

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 is provided on when to use this tool versus alternatives. It doesn't mention context, prerequisites, or exclusions (e.g., when to prefer connect_twitch_eventsub_bus or other chat buses). The description only states what it does, not when or why to choose it.

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