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

readOnlyHint=true already establishes this as a safe read, so the description's main job is filling in non-obvious behavior. It adds the underlying endpoint (Dub: GET /links), which is useful context, but says nothing about default pagination, the default for showArchived, or total-count metadata. Adequate but thin for a 7-parameter list operation.

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 with zero filler, and the ungated verb+resource leads before the optional filter caveat. 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 should at least signal the return shape (a paginated list of link objects) and pagination defaults, but it does not. All seven parameters being optional and the endpoint hint partially mitigate this, yet an agent still can't predict result structure or default page size from the definition alone.

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 parameter (page, domain, search, folderId, pageSize, tagNames, showArchived) is already documented in the schema. The description merely restates the categories of filters, adding no syntax, defaults, or matching semantics beyond what's structured. 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+resource ('List short links') and enumerates the four filter axes, which cleanly distinguishes it from siblings like dub_count_links, dub_get_link, and dub_list_domains. An agent can identify this as the retrieval tool without opening the 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?

The filter list implies when this tool is appropriate (browsing/searching links with optional narrowing), but there is no explicit when-to-use or when-not-to-use guidance and no pointer to alternatives. It never clarifies the relationship to dub_count_links or dub_get_link for single-link retrieval.

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