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

Annotations already declare it read-only, non-destructive and closed-world, so safety is covered. The description contributes genuine behavioral context beyond that: provider acceptance alone is not success, so status must be checked for a terminal verified state. It does not cover error auth or rate-limit behavior, but that is a minor gap against the annotation coverage.

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?

Three sentences, front-loaded with the usage condition and the key caveat about acceptance vs. success. The final sentence degrades into a loose list of return fields, which is slightly wasteful since an output schema exists, but overall it is tight.

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?

An output schema exists, so return values need not be described, and annotations cover the safety profile. Purpose and timing are well covered. The only real omission is the semantics of the required id parameter, which prevents a 5.

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%, so the description must carry the burden for the single required 'id' parameter. It never explains what that id identifies (post id, delivery id, attempt id?). The word 'IDs' appears only in the list of returned data, not as an input clarification, leaving the required parameter ambiguous.

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 gives a specific operation and scope: verify whether each provider reached a terminal verified state, returning deliveries, attempts, IDs, URLs and receipts. It clearly reads as a delivery-verification tool distinct from get_post_status, though it never explicitly names sibling tools to sharpen the distinction.

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 states the trigger condition explicitly: 'Use this after a publish or scheduled run.' That tells the agent when to reach for it. No exclusions or named alternatives are offered, so it stops short of a 5.

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