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

Annotations already declare readOnlyHint, idempotentHint and non-destructive, so safety is covered. The description adds genuine value beyond that with sort order ("newest first"), inclusion of click metrics, and the "Free" note about cost/quota. It says nothing about pagination behavior or the result cap despite exposing limit/offset.

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?

Three tight fragments with the resource and ordering front-loaded and the query semantics immediately after; nothing is padded. The clipped style ("Free.") is efficient, though it reads slightly telegraphic rather than explanatory.

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 read-only list tool with no output schema, the missing pieces an agent needs are pagination limits and what a returned link record contains (the description only mentions clicks). Annotations cover the safety profile, but the parameter documentation gap is not filled in the prose.

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%, so the description carries the burden, and it only compensates partially: it explains that `query` matches code, title or address, which the bare string schema does not. `limit` and `offset` are left completely unexplained — no default, max (200), or pagination semantics — which is a real gap for a listing tool.

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 the resource ("this account's short links") with an implied list action plus scope (account-only, newest first, clicks included). That is enough to separate it from links_get, links_shorten, links_update and links_delete, which act on single links or mutate them. It never uses an explicit verb like "list", but the shape is unambiguous.

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?

Usage is implied rather than stated: an agent can infer this is the enumeration tool versus links_get for a single link, but no sentence says when to prefer this over links_get or how to drill into one result. No exclusions or prerequisites are given.

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