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

The description adds the REST endpoint and optional event filtering, which is useful context. However, readOnlyHint=true already covers the safety profile, and the description does not disclose pagination behavior, sorting semantics, or auth requirements.

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 sentences, front-loaded with the core action and scope, followed by a compact API mapping. No wasted text.

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?

For a simple read-only list tool with full schema coverage and no output schema, the description is nearly sufficient. The main remaining gap is that it does not route the agent between this account-scoped list and the broader sibling list tool.

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 the schema already documents all four parameters. The description reinforces the event_id filter but does not add syntax, defaults, or behavioral detail beyond the schema.

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 event registrations for one account, with an optional single-event scope. This distinguishes it from the sibling list_event_registrations, which is not account-scoped.

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 the usage context by saying 'one account has made, optionally for a single event', but it does not explicitly name alternatives or state when to prefer this tool over neon_list_event_registrations or neon_get_event.

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