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

The readOnlyHint annotation already tells the agent this is a non-mutating read. The description adds the endpoint hint 'Dub: GET /links.', which reinforces that profile, but says nothing about pagination behavior, default page size, result ordering, or rate limits beyond what the schema already exposes.

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?

Two short sentences, front-loaded with the action and its filter dimensions. The trailing 'Dub: GET /links.' is mildly redundant but cheap and adds endpoint context, so it does not hurt much.

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, fully optional 7-parameter list tool with no output schema, the description covers all the filter axes an agent needs to choose between them. It omits only pagination defaults and result ordering, which are minor gaps given the rich schema.

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%, so every one of the seven parameters is already documented in the schema with its own description. The description's filter list maps onto domain/tagNames/folderId/search but adds no format, matching, or combination semantics 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 (List) and resource (short links) and enumerates the filter dimensions, so an agent knows exactly what the tool returns. It does not explicitly distinguish itself from the nearby dub_count_links or dub_get_link siblings, which keeps it short of a 5.

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 by the enumeration of filters (domain, tag, folder, search), which tells the agent this is the broad query tool rather than a single-record fetch. However, no when-to-use/when-not guidance or named alternative (e.g. use dub_count_links for totals, dub_get_link for one link) is given.

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