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

Adds behavior well beyond the annotations: it discloses the 50-item cap, the all-or-nothing transactional guarantee ("if one fails nothing is scheduled"), and the four validation gates (ownership, destination, media, lifecycle). These are exactly the traits an agent needs before firing a destructive, non-idempotent batch write.

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?

Front-loads the action in the title line, then adds three tight sentences with no filler. The atomicity guarantee and prerequisite are each given their own sentence, which is efficient and readable.

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?

For a batch mutation with annotations already covering the safety profile and no output schema, the description covers cap, atomicity, validation, and preconditions. It omits only failure-reporting/retry details on error, which is a minor gap.

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?

Top-level schema description coverage is 0%, so the description must compensate. It partially does by mapping the items array to post/video/story kinds and stating the 50-item cap, but it never explains the id, scheduledFor, platforms, or requestKey semantics (though requestKey/platforms are described in the nested schema).

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 (Schedule) plus the resource and scope (a campaign of up to 50 existing posts, videos, and stories in one transaction). It clearly distinguishes itself from the single-item siblings (schedulePost/scheduleStory/scheduleVideo) by framing itself as the bulk/campaign path.

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?

Gives a clear operating context (batch scheduling, including republishing unchanged published posts/stories to new destinations) and a prerequisite ("Confirm all destinations and times first"), which implies when to use it. However, it never explicitly names the single-item siblings it should be preferred over, so routing isn't spelled out.

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