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 the safety profile is covered. The description usefully discloses what the results contain (returned status and errors), but says nothing about pagination via 'limit', ordering, or what happens when the message has no attempts.

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 tight sentences with zero filler, the purpose front-loaded before the usage hint. Nothing is redundant or restating the title verbatim.

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's brief list of returned fields (status, errors) is helpful, and annotations cover safety. However, with 0% parameter coverage and a limit parameter whose semantics are unexplained, a few more words on pagination and required IDs would materially improve call correctness.

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 all three parameters (appId, messageId, limit) are undocumented in the schema. The description compensates for none of this: it never mentions the limit cap of 100, pagination/cursor behavior, or that appId and messageId are required identifiers. With low coverage the description carries the burden and fails to.

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 states a specific verb and resource: inspect delivery attempts for an outbound webhook message, with the additional scope of status and errors. It is clear on its own, but it does not differentiate from the near-identical sibling 'list_delivery_attempts', which an agent could easily confuse with this tool.

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 gives an intended use case (verify delivery or diagnose failures), but that is essentially the same reason an agent would call any delivery-attempt listing tool, so it does not actually route the agent between 'list_delivery_attempts', 'list_messages', and 'get_message'. No exclusions or alternative-routing guidance are provided.

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