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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new behavioral context beyond the annotations: the payload is identical for all users and immutable within a conversation, which tells the agent caching/reuse is safe. It does not mention payload size or any truncation behavior, keeping it short of 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?

Three sentences, front-loaded with the payload enumeration and closed with the reuse instruction. Minimal waste, though 'It is the same for everyone' and 'does not change during a conversation' are two clauses carrying nearly the same caching point and could be merged.

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?

An output schema exists, so return-value documentation is not the description's burden, and it nonetheless previews the returned content accurately. With no parameters and annotations covering safety, an agent has everything needed to call this correctly and know when not to call it again.

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?

Zero parameters, so there is nothing for the description to disambiguate and the baseline 4 applies. The description also correctly implies the tool takes no filtering arguments, since the content is described as fixed for everyone.

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 enumerates exactly what the tool yields: topic types, allowed widget kinds per topic type, card sizes and their rendering, ranges, plans and theme options. That is far more specific than the bare title 'Get capabilities' and clearly separates it from every mutation sibling (create_*/update_*/archive_*). It stops just short of 5 because it never states the action verb plainly (e.g. 'returns a static catalog'), relying on the reader to infer that this is the read that produces those things.

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 gives explicit timing and cadence: read once, before the first dashboard change, then reuse. It also names the equivalent resource (dashly://capabilities) so an agent knows there is an alternative access path rather than a second tool call to make. No ambiguity about when this should be invoked.

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