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

No annotations, so the description carries the full burden. It discloses the sharing-context constraint (WeChat blocks links), which is useful behavioral context. However, it doesn't state what the generated password looks like, whether it's an ephemeral token, whether it requires auth, or any side effects. For a generation tool with no annotations, more behavioral detail would be expected.

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?

Two tight sentences, front-loaded with the purpose and immediately followed by the scoping rule. No wasted words.

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 two-parameter generator with no annotations and no output schema, the description gives the key usage context but omits parameter meaning (especially 'text') and output expectations. It's minimally viable but leaves an agent guessing about the optional field.

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 coverage is 0% and there are two parameters. The description only implies what 'url' is; the optional 'text' parameter is entirely unexplained in both schema and description. With low coverage, the description must compensate but does not, leaving a real gap.

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?

States a specific verb+resource: 'create a taobao password (tao-kou-ling) from a URL'. The parenthetical clarifies the domain concept. Siblings in the cps_* family are mostly convert/search/order tools; this one is distinguishable as a share-link generator, though the description doesn't explicitly name a sibling it might be confused with.

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?

Explicitly states the condition to use it (out-of-app sharing) and the exclusion (in-app product cards should use click_url directly). This is a clear when/when-not with the alternative mechanism named.

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