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

Annotations already flag openWorldHint=true and destructiveHint=false, but the description adds genuinely non-structured information: approval is not an immediate post, it defers to the slot's time and networks, and public posting additionally requires explicit in-chat user consent after viewing. It omits reversibility (cancel_publication exists) and idempotency 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?

Two sentences with no filler, but the phrasing is tangled: 'a ready video of the calendar that waits for it (Manual)' requires re-reading, and the colon-plus-parenthetical structure buries the key consequence. The outcome (it posts) should lead rather than trail the mode labels.

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 one-parameter, openWorld mutation with no output schema, the description covers the action's consequence and the consent gate, which is the critical piece. It leaves gaps the agent would care about: what happens on failure, whether approval is revocable, and which slot_id to supply.

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?

There is one required parameter, slot_id, with 0% schema description coverage, and the description never mentions it or explains how to obtain a slot id. 'The calendar that waits for it' and 'its slot's time' only obliquely imply the slot concept, so the agent gets almost no semantic help beyond the schema's bare string type.

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 (approve / 'gives the OK') on a specific resource (a ready video in the calendar) and names the resulting effect: posting at its slot's time on the slot's networks. It does not differentiate itself from close siblings like approve_slot, approve_plan, or publish_video, so an agent must infer the boundary from the name alone.

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?

It splits usage into two named modes (Manual vs Public) and states the precondition for Public: the user must have watched the video and said yes in this chat. That is real conditional guidance, but it never says when to reach for this instead of publish_video or approve_slot, and it doesn't say whether Manual videos can also be approved here.

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