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

Annotations already establish readOnlyHint and openWorldHint=false, so the description owes less. It adds the most important behavioral context the agent could not infer: the response distinguishes actions the agent may call now, actions only a person can perform, and actions not yet available, and it explains what to do for each group. Pagination and size limits are not covered, but the shape and meaning of the result are clear.

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?

Relevant content appears first, but the definition is one long, dense sentence that strings several return sections and clauses together. The value is real, but the phrasing would be easier to use as a short list, and some descriptions repeat the same idea.

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?

There is no output schema, so the description must describe the return value, which it does thoroughly for a tool of this complexity and zero parameters. Only minor gaps remain, such as whether the tool lists itself or how large the tool catalogue can be.

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?

There are zero parameters, so the baseline is 4. The description correctly describes a no-argument call and does not waste space on irrelevant parameter detail.

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?

It spells out the resource and its three sections (`asks`, the callable tool list grouped by family with mutation flags, `held`, and `not_lent`), so the agent knows it is a discovery/roadmap call rather than an action. It is not confused with any sibling, though the title 'What can I do' does not carry the meaning and the description carries it 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?

It contains explicit routing guidance: 'give your user these when they ask what you can do'. It does not state when not to call it, for example in the middle of an established workflow, or refer to alternatives such as `whoami` or `query`, but the positive trigger is unmistakable.

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