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

No annotations exist, so the description must carry the behavioral profile. It does disclose several important traits: the tool is not a communication channel, it refuses to operate without explicit user-reported contact, and it runs preview-first with a hash-confirmed second call. It does not say what happens on a stale or mismatched hash, whether an existing followup is overwritten, or what authorisation is needed.

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 text is short, densified with semicolons, and puts the key gating constraint early. The leading '登录;' fragment is unexplained noise that costs a beat of parsing. Otherwise no sentence is filler.

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 9 parameters, no annotations, and no output schema, the definition carries a lot of weight. The preview/hash contract is stated, but the agent still lacks the meaning of several inputs, the failure mode for hash mismatch, and any indication of what the call returns or overwrites. Adequate to attempt a preview call, not complete.

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 has to compensate for all 9 parameters. It does explain the preview/previewHash workflow and, implicitly, the userReportedContact gate, but it says nothing about done, note, conversationId, organizationId, channel, or the result enum values. Roughly a third of the parameters are covered, and the most workflow-critical ones.

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 names a specific verb and resource ('仅在用户明确说已做联系并给出结果时记录'), and the negative clauses ('不执行拨号、短信或发送') clarify that this is a back-office record write rather than a messaging tool. Sibling names like set_host_followup_done, remind_host_followup, and list_host_followups are never mentioned, so the agent must infer the boundary itself. The opening fragment '登录;' does not contribute to purpose clarity.

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?

It gives a concrete when-to-use gate (only when the user explicitly states contact was made and supplies a result) and an implicit when-not (it does not dial, text, or send). The preview-then-confirm routine tells the agent the required call sequence. It stops short of naming alternatives such as set_host_followup_done or remind_host_followup, so the routing decision against siblings is left implicit.

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