bitpull_group_preview

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

readOnlyHint=true already tells the agent this is a safe, non-mutating call, so the description does not need to defend safety. It adds the useful behavioral note that the result is a hypothetical distribution (nothing is started), but says nothing about what the preview contains or whether it requires the group to be fully configured first.

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?

It is a single short sentence with no filler, which is good. But it is a grammatically incomplete fragment rather than a front-loaded statement of what the tool does, which slightly weakens first-pass comprehension.

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 simple one-parameter read-only tool with no output schema, the description's conceptual explanation is close to sufficient. The remaining gap is the meaning/format of the 'model' argument, which an agent needs in order to call it correctly and which nothing else in the definition supplies.

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 is one required parameter, 'model', with 0% schema description coverage and no constraints explained anywhere. The description only says 'a model' and never clarifies whether that means a model name, an ID, a path, or a hub identifier, leaving the agent to guess the accepted format.

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 conveys the concept — a preview of how a model would be split across machines — which is more than a restatement of the name, but it is a noun clause with no verb and never says it is a dry-run/read-only operation. An agent can guess it is a planning/dry-run view, but distinguishing it from bitpull_start_group or bitpull_share_group relies on inference rather than explicit wording.

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?

'before starting it' implies the usage window (call this prior to launching the group), which is useful implied guidance. However, no sibling is named as the alternative and there is no statement of what to do instead if the user actually wants to launch, share, or inspect the group.

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