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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds genuine value beyond that: the scope is the calling user's own posts, results are ordered newest first, and the possible status values (scheduled, uploading, posted, failed, cancelled) plus the presence of an error message are disclosed. It does not say whether cancelled or failed posts persist in the list, which is the main remaining gap.

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?

Two sentences, front-loaded with the resource and ordering, then the returned fields, then the usage cue. Every clause carries information; nothing is redundant with the title or name.

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 no output schema, the description usefully enumerates the returned fields and their meaning, and annotations cover the safety profile. The only material omission is the undocumented `limit` parameter, which leaves a small but real hole for a one-parameter tool.

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 0% and the description never mentions the single `limit` parameter at all. The schema does supply type, default 10, minimum 1 and maximum 50, which is largely self-explanatory, but the description gives no hint about how many posts come back by default or whether limit caps the whole history or just a window.

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 names a specific resource (the user's recent YouTube / X posts made through TTSForFree) and states the ordering (newest first), plus the fields returned: status, post_url, scheduled time, error message. It is clearly distinct from publish_video by being a listing operation, though it does not explicitly separate itself from the similarly named get_publishing_status or list_recent_jobs.

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?

"Use it after publish_video to report the live link" gives a concrete triggering context and ties the tool to a specific sibling's workflow. It offers no when-not-to-use guidance or rate/refresh caveats, so it falls short of a full 5.

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