Set display name

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

With no annotations, the description carries the behavioral burden. It indicates a mutation of the peer-visible name, which is transparent about the operation's primary effect. It does not clarify persistence, whether past messages are affected, or any permission/error conditions, but for a simple setter this is acceptable.

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?

A single concise sentence that front-loads the action and resource, with no filler or redundancy. Every word adds value.

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 one-parameter, no-output-schema setter, the description is largely complete: it states the operation, the target attribute, and the audience. Minor gaps like return value, error behavior, and scope of effect (future messages vs history) are not critical for basic invocation.

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%, so the description must explain the parameter. It does so directly: 'name' is the display name shown to peers. This adds meaning beyond the bare schema property and resolves ambiguity about what kind of 'name' is expected.

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 uses a specific verb ('Set') and a specific resource ('display name'), and clarifies the exact scope: 'shown to peers on your messages'. This clearly distinguishes it from sibling tools like send_message, status, or join_room.

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?

The description's effect is clear enough to imply its use case — call when you need to change the name peers see on your messages. However, it gives no explicit guidance on when not to use it or how it compares to alternatives (e.g., whether it affects history).

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