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

Annotations already flag destructive=true and idempotent=true, so the safety profile is partly carried, yet the description adds genuine value: up-to-a-minute redirect propagation, broken QR codes, irreversibility from this tool, already-deleted treated as not found, and the stillUsedOnBioPages response hint. That is well beyond what the annotations declare.

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?

Front-loaded with the action, then consequences, then the error case, then the Bio-page caveat — each sentence carries new information. The final sentence is slightly dense and mixes the side-effect report with a disclaimer, but no wording is wasted.

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 destructive one-parameter tool with no output schema, the description covers consequences, timing, irreversibility, error semantics, and the partial response shape. Remaining gaps are minor: no mention of permission requirements or whether a success confirmation is returned.

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 a single parameter with 100% schema coverage, so the schema already documents slug fully. The description adds nothing about slug form or format; baseline 3 applies when the schema does all the work.

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?

"Delete a short link" is a concrete verb+resource, and the following sentences define exactly what deletion means for a DexURL link (stops redirecting, removed from library, QR codes break). Against siblings like update_link or get_link, the destructive intent is unmistakable from the first two words.

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 deletion context clearly and even handles the repeat-call case, but it gives no explicit when-to-use/when-not-to-use guidance relative to alternatives such as update_link or bio-page management. An agent that wants to only unhook a link from a Bio page is not pointed anywhere, even though the description notes that a Bio page listing survives the delete.

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