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

Annotations are empty, so the description carries the burden of behavioral disclosure. It does state that the webhook URL receives a PUT call with a JSON object on wallet events, which is useful. However, it does not disclose whether setting a webhook overwrites existing ones, whether the webhook is immediately active, or any authentication verification steps. The description is moderately transparent but lacks key behavioral details.

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 repeats the opening sentence 'Sets a webhook on this wallet' twice, which is redundant. The @param and @return sections are useful, but the repetition adds noise. It is not as concise as it could be, earning a mid-range score.

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?

An output schema exists, so the description need not explain return values. However, it does not address important contextual aspects such as whether multiple webhooks are allowed, how to update or delete, or the relationship with sibling lifecycle tools (pause/resume/view). The description covers the basic action but leaves notable gaps for an agent to fully operationalize the tool.

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?

Despite 0% schema coverage, the description provides @param lines for all four parameters, adding meaning beyond the bare schema. It explains that api_key is the application key, token and wallet_fk come from /access/login, and url is where to receive PUT calls. This is helpful, though the explanations are brief and lack format constraints (e.g., URL validation).

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 clearly states 'Sets a webhook on this wallet', using a specific verb and resource. It distinguishes itself from sibling tools like webhook_pause, webhook_resume, and webhook_view by indicating a creation/setting action. The purpose is immediately understandable.

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 implies the usage context: to receive PUT notifications for wallet events. However, it does not explicitly state when to use this tool versus alternatives like webhook_view or webhook_pause, nor does it provide exclusions. The guidance is only implicit.

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