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

Annotations already establish readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so safety is covered. The description adds useful behavioral context: response shape { count, next_skip, items } and the next_skip-to-skip pagination loop. It does not mention auth or rate-limit considerations, keeping it below a 5.

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?

The description is compact and front-loaded: resource fields, return shape, pagination, id lookup, filtering, and endpoint are each stated once with no wasted prose.

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 no-output-schema list tool, the description supplies the missing return shape, pagination contract, and filtering modes. With annotations covering the read-only profile and the schema covering parameters, nothing essential is left ambiguous.

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 every parameter thoroughly. The description reinforces id, skip, filters, and query usage, but adds little beyond what the schema descriptions already say; the event field list is not parameter guidance.

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 identifies the resource (calendar events), lists representative fields, and states the HTTP operation (GET /events), so an agent can tell this is a list/read tool. It does not explicitly compare itself with siblings such as plutio_create_event or plutio_list_schedulers, so it falls short of a 5.

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 explains two key usage modes: pass id to read one record, or use filters/query to list. It also explains pagination flow, but it does not state when to choose this tool over adjacent list tools or when not to use the id mode.

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