test_youtube_credentials

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only repeats the tool's name and does not state whether the operation is read-only, whether it makes network calls, what it validates, or what consequences the test might have. No behavioral traits are actually disclosed.

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, clear sentence with no redundant wording. It is front-loaded and wastes no tokens, which is appropriate for such a simple tool.

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?

Given the zero-parameter schema and the presence of an output schema, the description is minimally viable for invoking the tool. However, it leaves ambiguity about what 'test' entails, such as whether it checks authentication validity, network connectivity, or both. Some context about the check's scope would make the description complete.

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 tool has zero parameters, so the schema offers nothing to document. The baseline for a parameterless tool is 4, and the description does not need to add parameter meaning since none exist.

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 states a specific verb ('Test') and a specific resource ('YouTube API credentials'), which clearly distinguishes this tool from sibling credential-testing tools like test_spotify_credentials and test_steam_credentials. The purpose is immediately understood without needing to inspect schema.

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 about when to use this tool versus alternatives such as get_youtube_token_status or test_connection. There is no explicit context for when credential testing is appropriate or when another tool should be preferred.

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