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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely useful behavioral context: clicks exclude previews and crawlers, and bot traffic is reported separately. It does not mention error behavior for unknown codes, but that is a minor gap given the annotations.

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 purpose is front-loaded, and the two sentences carry no obvious repetition. The parenthetical about link previews and crawlers is slightly dense but earns its place by clarifying the click count.

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?

There is no output schema, so the description must carry the return-value burden, and it does: destination, destination rules, click breakdown, creation/expiry dates, last click and recent history. It is complete enough for an agent to know what to expect, with only minor gaps around edge cases.

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 100%, and the schema already explains that 'code' is the short code or custom alias. The description only refers to 'the same code' in the get_analytics sentence and adds no syntax or format detail beyond the schema. Baseline 3 applies.

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 and resource ('Details of one link') and enumerates the fields returned. It also explicitly distinguishes itself from get_analytics, so an agent can tell the two apart without opening either schema.

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?

Names get_analytics as the alternative for country, device and referrer breakdowns, with the condition 'use get_analytics with the same code'. It does not explicitly cover when to use list_links instead, but the single-link scope makes that largely implicit.

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