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Achanandhi-M

youtube-watch-mcp

by Achanandhi-M

Add YouTube channel to watchlist

add_channel

Add a YouTube channel to start tracking new uploads. Enter a channel ID, @handle, or URL.

Instructions

Start tracking a YouTube creator for new uploads. Accepts a channel ID (starts with UC), an @handle, or a full channel URL.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
inputYesChannel ID, @handle, or YouTube channel URL
nicknameNoFriendly name to refer to this channel by later; defaults to the channel's YouTube title
Behavior3/5

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

With no annotations, the description carries full burden; it discloses input formats but lacks details on idempotency, side effects, or authorization needs.

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

Conciseness5/5

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

Two sentences, no wasted words, front-loaded key information.

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

Completeness4/5

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

For a simple tool, it covers the core action and input formats; missing edge cases like duplicate handling or success response but still adequate.

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

Parameters4/5

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

Schema coverage is 100% (both parameters described), but the description adds specific format details for the 'input' parameter (e.g., ID starts with UC), which goes beyond the schema.

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

Purpose5/5

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

The description clearly states the verb 'Start tracking' and the resource 'YouTube creator', and it distinguishes from siblings like 'remove_channel' and 'list_channels' by focusing on adding a channel.

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

Usage Guidelines3/5

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

The description implies usage when wanting to add a channel but does not explicitly compare to siblings or provide 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.

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