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

Annotations already declare readOnly, idempotent, non-destructive and closed-world semantics, so the safety profile is covered. The description adds one useful behavioral fact — that recent occurrences are bundled in the response — but says nothing about how many occurrences, pagination, or how far back 'recent' reaches.

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?

One lean sentence with the resource and the return scope front-loaded and zero 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?

For a simple read-by-id tool with rich annotations and no output schema, this covers what's needed to invoke it correctly. The only shortfall is that the shape of the 'recent occurrences' payload is left entirely unspecified.

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 coverage is 100% for the single 'id' parameter, so the baseline applies; the description adds nothing about id format (UUID vs prefixed string) or behavior on an unknown id.

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 ('Retrieve') and resource ('recurring schedule') and adds scope detail — that time-based occurrences come back with it. It does not explicitly distinguish itself from list_schedules, but the singular-by-id framing plus the name makes the distinction inferable.

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 gives no when/when-not guidance and names no alternative (list_schedules, get_scheduled_message). An agent must infer from the name alone that this is the by-id lookup path.

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