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

Annotations already declare a non-read-only, idempotent, non-destructive, closed-world write. The description adds value beyond that: authorization requirement, the narrow side effect ('Creates a directory listing only'), and the retry/idempotency mechanism via a stable request_id, plus that publication state is chosen explicitly rather than defaulted. It still omits whether retries with a changed payload are rejected or what is returned on success.

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 short sentences, no filler, with the core action and the 'directory listing only' scope constraint front-loaded. Tight and readable, though the request_id sentence could be folded into a retry clause.

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?

A nested, ten-field required payload with zero schema descriptions and no output schema means the description carries the burden of explaining the listing structure, and it does not. An agent knows it must register something and reuse a request_id, but not what to put in most fields or what the call returns.

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% and the listing object has ten required subfields with no documentation anywhere. The description compensates only for request_id (stable, for retries) and publication (explicitly selected), leaving names, objectives, topics, links, instructions and availability semantics unexplained.

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?

States a specific verb+resource: 'Register a public repository your user is authorized to represent', and narrows scope with 'Creates a directory listing only'. This distinguishes it from read siblings (get_swarm, search_swarms) and implies it is the create-counterpart to update_swarm, though it never names an alternative.

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?

Gives one concrete operational instruction ('Use a stable request_id for retries') and a precondition ('your user is authorized to represent'), which is useful. However, it never says when to register vs. update an existing swarm, nor what to do if the repository is already registered, so routing guidance is only implied.

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