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

With no annotations, the description carries the full disclosure burden. It implies the listing is filtered to active caches only and personalized ('your progress'), which is worth something, but it says nothing about authorization requirements, result ordering, pagination, or the shape of the returned data.

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?

At six words it is certainly terse and front-loaded, but it is under-specified rather than economical: it omits the verb entirely and breaks the sentence into a fragment. Brevity here costs clarity rather than saving it.

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?

Because the tool takes no arguments and has no output schema, invocation is trivial and the description is technically sufficient to call it. However, with no annotations and no return-value documentation, an agent has little basis for predicting what a listing will contain.

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 schema declares zero parameters, so there is no parameter semantics for the description to document. Baseline 4 applies for a no-argument tool.

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 ('treasure caches') and adds a scope qualifier ('Active ... with your progress'), but it is a bare noun phrase with no verb, so the action (listing) is only inferred from the tool name. It also fails to distinguish itself from the sibling view_cache, which an agent could reasonably pick instead.

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 use this tool versus alternatives such as view_cache (single cache) or list_agents. The agent must infer the choice entirely from the tool name and the 'Active' qualifier.

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