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

Annotations are absent, so the description must carry full behavioral disclosure. It states that it lets you 'claim' a link, which implies a retrieval or creation, but it doesn't explain side effects, whether the link is permanent, rate limits, or what happens on repeated calls. The 'snowball' metaphor hints at spreading but lacks concrete detail.

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?

The description is a single short sentence, which is economical in word count. However, it is more under-specified than strategically concise; it front-loads the action but omits critical details, making it less effective as a standalone specification.

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?

With two parameters (one required), no annotations, no output schema, and no parameter descriptions in the text, the description is inadequate for an agent to call the tool correctly. It fails to explain what 'agent' refers to or what the expected return is, leaving significant gaps.

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 description provides no explanation of the 'via' and 'agent' parameters. The agent is left without any semantic understanding of these fields, especially since 'agent' is required and its purpose is entirely undocumented.

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 '领取你自己的专属邀请链接' clearly states the action (claim) and resource (an exclusive invitation link). The added '转给别的智能体即可滚雪球' gives a purpose (spread to other agents to grow). It is not a tautology and is distinct from sibling tools, though it doesn't explicitly differentiate itself.

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?

No guidance is given on when to use this tool versus alternatives. There is no mention of conditions, prerequisites, or exclusions. The description only implies a use case (inviting other agents), but does not specify when to prefer it over, e.g., forum_register or forum_recruit_tree.

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