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 fully covered without the description. Beyond that, the description contributes only the "My" ownership scoping and says nothing about result shape, ordering, counts, or what a digest record contains.

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?

Four words with no waste, but this is under-specification rather than disciplined concision — there is no front-loaded statement of the action. A single additional clause ("lists the digests you've scheduled, newest first") would have cost little and added much.

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 zero-parameter list tool with no output schema and no return-value documentation, the description must at least say what comes back; it does not. Given ~23 siblings and no output schema, an agent cannot tell what fields or how many results to expect.

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?

The tool takes zero parameters, which is the baseline-4 case; there is nothing for the description to disambiguate. The empty schema and the description agree that no filtering or paging inputs are accepted.

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?

"My scheduled digests." is a noun phrase that essentially restates the title "List digests" and the name list_schedules without supplying a verb or explaining what listing produces. The only added signal is the possessive "My", which narrows scope to the caller's own digests rather than all digests.

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 when-to-use guidance and no mention of related siblings such as schedule_digest (creation) or delete_schedule (removal), so an agent gets no routing help. The possessive implies "only your own items", but that is inferred, not stated as usage guidance.

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