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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful content about what event records contain (inbound messages, outbound statuses), but says nothing about ordering, retention, or pagination behavior beyond the page parameter.

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 sentences with the core action front-loaded and the scope clarification immediately after. No filler, though the second sentence is slightly loose ('This will show…') rather than crisply enumerated.

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?

A simple read-only list with an output schema, full annotation coverage, and a fully documented single parameter — the description is sufficient to call it correctly. Only pagination/ordering semantics for iterating results are left implicit.

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% and the single page parameter is fully documented in the schema, so the baseline of 3 applies. The description adds no extra meaning such as page size, total counts, or sorting that would help an agent page through events.

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 webhook events received') and clarifies the scope as both inbound messages from the user and delivery status of outbound sandbox messages. It does not, however, differentiate itself from nearby siblings such as get_webhook, test_webhook, or sandbox_get_webhook_configuration.

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 description implies a debugging/inspection use case by noting it shows received messages and their statuses, but it never says when to pick this over sandbox_get_webhook_configuration or test_webhook, nor does it state any prerequisites (e.g., a configured sandbox webhook).

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