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

Annotations already declare readOnlyHint and destructiveHint, so the safety profile is covered; the description goes further by disclosing what is returned (status, attempts, receiver HTTP status) and explicitly what is never exposed (payload, URL, receiver response). That privacy/exposure boundary is a behavioral trait the annotations cannot convey.

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 short blocks, front-loaded with what the tool returns before the usage line. Every clause carries information — ordering, cap, status vocabulary, exclusions — with no filler.

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 structure need not be re-explained, and the description still covers ordering, result cap, status values, and excluded fields. For a two-parameter read-only list tool this is everything an agent needs to call it and interpret the result.

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 100%, so both limit and project_id are already documented in the schema. The description only echoes the 50-item cap implied by the schema's maximum and adds no new semantics for either parameter; baseline 3 applies.

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 and resource (list alert deliveries to webhooks and alert channels), plus ordering (newest first) and a hard cap of 50. The resource is distinct enough from the sibling tools (policies, events, audit log, projects) that an agent can route correctly without opening the schema.

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?

The explicit 'When to use: To check whether alerts are reaching their destination' gives a concrete decision context. It does not name an alternative tool or state when not to use it, so it falls short of the top band, but the intended scenario is unambiguous.

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