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 only the filter buckets, which duplicate the schema enum — nothing about ordering, pagination, or how 'all open' relates to completed follow-ups.

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 short fragment with no wasted words, but it is under-specified rather than concise: there is no leading verb or scope statement, so the reader must guess the operation from the tool name.

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 two-parameter list tool with no output schema, the description should explain the limit/default behavior and what a follow-up record contains. Instead it covers only the due-window buckets, leaving an agent unable to predict result size or shape.

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 0%, so the description carries the burden. It loosely restates the `due` values (adding a hint that 'all' means all open), but the `limit` parameter — with its default of 50 and maximum of 100 — is never mentioned, leaving half the parameters undocumented anywhere.

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 names the resource (follow-up reminders) and enumerates the time windows, but it is a noun-phrase fragment with no verb and does not distinguish the tool from siblings like set_follow_up or complete_follow_up. An agent can infer it retrieves options, but only from the name/title, not from the description itself.

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?

There is no statement of when to call this versus set_follow_up, complete_follow_up, or recent_messages. The filter values hint at a read/list use case but no explicit usage guidance or exclusions are given.

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