youtube_account_info

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

With no annotations, the description carries the full burden, and it discloses only that the call is a read ('Get'). It omits the implied authentication prerequisite (the sibling youtube_cookie_set strongly suggests a session/cookie must exist first), whether it fails when unauthenticated, and any rate-limit or caching behavior.

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?

A single front-loaded sentence with no waste. It is arguably under-specified rather than verbose, but as written it earns its place.

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?

There is no output schema, so the description should describe what 'account identity' contains (channel name, handle, ID, email?), but it does not. For a trivial no-arg read this is a modest gap, not a fatal one.

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 takes zero parameters, so the baseline is 4; there is nothing for the description to disambiguate. Schema coverage is 100% and the empty schema is consistent with the description.

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?

States a specific verb ('Get') and resource ('account identity') and adds the scoping qualifier 'for the authenticated YouTube session', which distinguishes it from the cookie and playlist siblings. However, 'identity' is left undefined and the description never names what is retrieved, so an agent can't fully predict the payload.

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?

There is no when-to-use or when-not-to-use guidance and no mention of the alternatives (e.g., youtube_cookie_status for auth state). The purpose implies a diagnostic use case, but nothing in the text tells the agent when to reach for this tool versus the cookie tools.

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