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

Goes well beyond the readOnlyHint annotation by disclosing a non-obvious trait: the API does not page, at most `limit` items come back with the total, and a truncated flag signals when to narrow the query. This is exactly the operational detail an agent needs to avoid silently missing links.

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 tightly packed sentences, front-loaded with the core action, then the filtering constraint, then the route. No filler and each sentence carries unique 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 helpfully sketches the return shape (items plus total plus a truncated flag) and covers all filter parameters. It stops short of describing item fields, but for a list endpoint the operational picture is largely complete.

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 the schema already documents to, from, type, limit and search. The description restates the type semantics and limit defaults rather than adding new meaning, so the 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 concrete verb (List) and resource (the account's short links), specifies the type split between active and archived, and adds the underlying route GET /urls/{type}. An agent can distinguish this from tinyurl_get_link (single link) and tinyurl_get_analytics without opening a 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?

Gives clear usage context: date-range and alias/tag filters are optional, and the agent should narrow with from/to/search when the result is truncated. It does not explicitly contrast this tool with siblings like tinyurl_count_links, which is the only gap.

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