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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile needs no repetition. The description adds genuine behavioral context by disclosing the payload contents (link counts and tier limit information), though it says nothing about ordering, pagination, or whether folders are user-scoped vs workspace-scoped.

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?

A single short sentence with the action and the returned data front-loaded and no filler. Nothing could be removed without losing information.

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 no output schema, the description usefully names the two notable return fields, which is the main thing an agent needs to know before calling. Minor gaps remain around result volume and whether the listing is scoped to the authenticated account.

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?

The tool takes zero parameters, so the baseline applies; there are no parameter semantics to explain. The description correctly avoids inventing filters that the empty schema does not support, implicitly signaling that the call is unscoped.

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 (list link folders) and adds what the response contains (link counts, tier limit info), which goes beyond the title. It does not explicitly contrast with sibling list tools such as list_saved_views or list_domains, but the resource noun 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?

The description gives no when-to-use guidance: it never says to call this before assign_link_to_folder, update_folder, or delete_folder to obtain a folder ID, nor does it state any exclusions or prerequisites. Usage is only inferable from the name itself.

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