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

Annotations already declare readOnlyHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral facts: ordering ('newest first'), the fields returned, and that the call is free (no credit cost) — all useful and non-duplicative.

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?

A single dense sentence with zero filler, front-loaded with the resource and immediately followed by the fields and sort order.

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?

Adequate for a simple one-parameter list tool with annotations covering safety, but with no output schema and no explanation of appId (required? defaults to the current app?), an agent lacks the information to call it correctly in all cases.

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 parameter (appId) with 0% schema description coverage, and the description never mentions it or says whether it's optional/derived from workspace context. With low coverage the description is expected to compensate and does not.

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?

Names a specific resource (in-app events in App Store Connect) plus the fields surfaced (name, badge, state, dates), which lets an agent distinguish it from the write-side sibling app_event_create. The verb is only implied ('events ... newest first'), so it's clear but not maximally explicit.

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?

No statement of when to use this versus app_event_create or other app_* readers; the only contextual hint is 'Free'. An agent must infer that this is the read/list path for existing events.

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