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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered by structured data. The description adds genuinely new context beyond them: the output format (JSON array) and a subscription-tier requirement that gates whether the call will succeed at all. It omits any mention of export size limits or rate limiting for large accounts.

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 short sentences, front-loaded with the core action and scope, followed by the return format and the access requirement. No filler, no redundancy, and each sentence contributes a distinct fact.

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 one-optional-parameter read tool with no output schema, the description covers what is returned, how it is formatted, and the access prerequisite. The only material gap is that an agent cannot tell how this export relates to the sibling listing and stats tools.

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 description coverage is 100% for the single folder_id parameter, so the schema already explains its meaning and optionality. The phrase 'Optionally filter by folder' restates the schema rather than adding semantics such as folder nesting behavior or what happens when the ID is invalid. 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: 'Export all your shortened links as structured data', with the return shape ('JSON array') made explicit. It does not differentiate from the closely related list_links or export_link_stats siblings, so an agent must infer that this is the bulk-export variant rather than a filtered listing.

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 supplies a real prerequisite ('Requires Pro subscription or higher') and the optional folder filter, which implies a bulk export use case. However, it never states when to choose this over list_links for browsing or export_link_stats for analytics, leaving the key routing decision to inference.

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